Both animals and also fungi space heterotrophic. What distinguishes animal heterotrophy from fungal heterotrophy is the only pets derive their nutrition from

A) preying on animals.

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B) eat it.

C) consuming living, rather than dead, prey.

D) making use of enzymes come digest their food.


Which the the following is (are) distinct to animals?

A) cell that have actually mitochondria B) the structural carbohydrate, chitin C) worried conduction and muscular activity D) heterotrophy E) flagellated gametes

In regards to food capture, i m sorry sponge cabinet is most comparable to the cnidocyte of a cnidarian?

A) amoebocyte B) choanocyte C) epidermal cabinet D) gastrovascular cavity cell

Sponges are most accurately defined as

A) maritime predators. B) chemoautotrophs. C) freshwater scavengers. D) filter feeders. E) aquatic predators.

Which that the following functions as both a mouth and an anus in members the the phylum Cnidaria?

A) a noncentralized nerve net B) a gastrovascular cavity C) nematocysts D) one alimentary canal

Which the the following is true of members the the phylum Cnidaria?

A) They are not capable of locomotion because they lack true muscle tissue. B) castle are generally filter feeders. C) castle coordinate activities through a noncentralized nerve set. D) They are the easiest organisms v a finish alimentary canal (two openings).

The members of which clade in the phylum Cnidaria take place only together polyps?

A) Hydrozoa B) Scyphozoa C) Anthozoa D) Arthropoda

The last typical ancestor of all animals was more than likely a(n)

A) chytrid. B) yeast. C) algae. D) fungus. E) protist.

Evidence of which framework or characteristic would be most surprising to find among fossils that the Ediacaran fauna?

A) true organization B) difficult body components C) bilateral symmetry D) embryos

The most ancient branch point in pet phylogeny is that in between having

A) radial and also bilateral symmetry. B) a well-defined head and also no head. C) true tissues and also no tissues. D) a human body cavity and also no human body cavity.

According come the evidence gathered so far, the animal kingdom is

A) monophyletic. B) paraphyletic. C) no longer growing in size. D) cultivation at an exponential rate.

If a multicellular pet lacks true tissues, then it have the right to properly be included amongst the

A) eumetazoans. B) metazoans. C) choanoflagellates. D) lophotrochozoans. E) bilateria.

Which the the complying with statements concerning animal taxonomy is (are) true?

animals are more closely concerned plants than to fungi. All pet clades based on body arrangement have been discovered to be incorrect. Kingdom Animalia is monophyletic. Only pets reproduce by sexual means. Pets are thought to have evolved from flagellated protists similar to modern-day choanoflagellates. A) 5 just B) 1 and also 3 C) 3 and 5 D) 3, 4, and 5

If the existing molecular evidence about animal origins is well substantiated in the future, then what will be true of any kind of contrary evidence about the origin of pets derived from the fossil record?

A) The contrary fossil evidence will be viewed as a hoax. B) The fossil proof will be taken to have actually been understood incorrectly because it is incomplete. C) The fossil document will henceforth be ignored. D) Phylogenies involving also the smallest bit of fossil proof will have to be discarded. E) only phylogenies based specifically on fossil evidence will must be discarded.

Some researchers case that sponge genomes have actually homeotic gene (genes that regulate development of anatomical structures), however no Hox genes (genes that regulate breakthrough of posterior-anterior axes and body segments). If true, this finding would

A) combine sponges" evolutionary ties to the Eumetazoa. B) median that sponges must no longer be classified as animals. C) confirm the identification of sponges together basal animals. D) median that extinction sponges must have been the last typical ancestor that animals and also fungi. E) require sponges to it is in reclassified together choanoflagellates.

The last common ancestor of all bilaterians is believed to have had four Hox genes (genes that regulate breakthrough of posterior-anterior axes and body segments). Most extant cnidarians have actually two Hox genes, other than Nematostella, which has three Hox genes. Top top the basis of these observations, some have actually proposed the the genealogical cnidarians were originally bilateral and, in stages, shed Hox genes from your genomes. If true, this would mean that

A) Radiata must be a true clade. B) the radial the opposite of extant cnidarians is secondarily derived, quite than being an ancestral trait. C) Hox genes play small actual function in coding because that an animal"s "body plan." D) Cnidaria might someday change porifera as the basal bilaterians.

Which declare is most constant with the theory that the Cambrian explosion was resulted in by the increase of predator-prey relationships?

A) increased incidence of worm burrows in the fossil record B) raised incidence the larger pets in the fossil document C) boosted incidence of organic material in the fossil document D) increased incidence of difficult body parts in the fossil record

Whatever its ultimate cause(s), the Cambrian to explode is a prime example of

A) massive extinction. B) evolution stasis. C) adaptive radiation. D) a big meteor impact.

What is the probable succession in i m sorry the following clades of pets originated, indigenous earliest to most recent?

tetrapods vertebrates deuterostomes amniotes bilaterians A) 5 → 3 → 2 → 4 → 1 B) 5 → 3 → 2 → 1 → 4 C) 5 → 3 → 4 → 2 → 1 D) 3 → 5 → 4 → 2 → 1 E) 3 → 5 → 2 → 1 → 4

Fossil proof indicates that the complying with events arisen in what sequence, native earliest to many recent?

Protostomes invade terrestrial environments. Cambrian explode occurs. Deuterostomes invade terrestrial environments. Vertebrates become top predators in the seas. A) 2 → 4 → 3 → 1 B) 2 → 1 → 4 → 3 C) 2 → 4 → 1 → 3 D) 2 → 3 → 1 → 4 E) 2 → 1 → 3 → 4

Which of the following genetic processes may be most valuable in accountancy for the Cambrian explosion?

A) binary fission B) mitosis C) meiosis D) gene duplication

Which of these, if true, would assistance the claim that the genealogical cnidarians had bilateral symmetry?

Cnidarian larvae possess anterior-posterior, left-right, and dorsal-ventral aspects. Cnidarians have fewer Hox genes than bilaterians. All extant cnidarians room diploblastic. All cnidarians space acoelomate. A) 1 just B) 1 and 4 just C) 2 and 3 just D) 2 and 4 only E) 3 and 4 only

Which of the following animal groups is completely aquatic?

A) Mollusca B) Crustacea C) Echinodermata D) Nematoda E) Platyhelminthes

Chordate pharyngeal slits show up to have functioned very first as

A) the digestive system"s opening. B) suspension-feeding devices. C) materials of the jaw. D) gill slits for respiration. E) portions of the within ear.

Which of the following statements would be least acceptable to many zoologists?

A) The extant lancelets room contemporaries, not ancestors, of vertebrates. B) The first fossils resembling lancelets showed up in the fossil record roughly 530 million years ago. C) Recent work-related in molecule systematics support the hypothesis that lancelets space the basal clade the chordates. D) The extant lancelets are the prompt ancestors the the fishes. E) Lancelets display screen the same an approach of swimming as perform fishes.

Which extant chordates are postulated to be many like the more quickly chordates in physical appearance?

A) lancelets B) adult tunicates C) amphibians D) reptiles E) chondrichthyans

A new species the aquatic chordate is discovered that closely resembles an old form. It has the following characteristics: external armor that bony plates, no paired lateral fins, and a suspension-feeding setting of nutrition. In enhancement to these, it will certainly probably have which the the adhering to characteristics?

A) legs B) no jaws C) an amniotic egg D) endothermy

What perform all craniates have that previously chordates walk not have?

A) mind B) vertebrae C) cartilaginous pipe neighboring notochord D) partial or finish skull E) bones

The feeding mode of the extinction conodonts was

A) herbivory. B) suspension feeding. C) predation. D) filter feeding. E) absorptive feeding.

The earliest known mineralized structures in vertebrates are connected with i m sorry function?

A) reproduction B) feeding C) locomotion D) defense E) respiration

Jaws first occurred in which extant team of fishes?

A) lampreys B) chondrichthyans C) ray-finned fishes D) lungfishes E) placoderms

Which the these could have to be observed in the common ancestor the chondrichthyans and osteichthyans?

A) a mineralized, bony skeleton B) four C) digits D) a swim bladder

Which group"s members have had both lungs and gills throughout their adult lives?

A) sharks, skates, and also rays B) lungfishes C) lancelets D) bivalves

Which the the complying with belong come the lobe-fin clade?

A) chondrichthyans B) ray-finned fishes C) lampreys D) hagfishes E) tetrapods

Arrange this taxonomic state from most inclusive (most general) to the very least inclusive (most specific).

lobe-fins amphibians gnathostomes osteichthyans tetrapods A) 4, 3, 1, 5, 2 B) 4, 3, 2, 5, 1 C) 4, 2, 3, 5, 1 D) 3, 4, 1, 5, 2 E) 3, 4, 5, 1, 2

During chordate evolution, what is the sequence (from faster to most recent) in which the following structures arose?

amniotic egg paired fins jaws four-chambered heart A) 2, 3, 1, 4 B) 3, 2, 1, 4 C) 4, 1, 3, 2 D) 2, 1, 3, 4 E) 1, 3, 2, 4

Which of the following are the most abundant and diverse that the extant vertebrates?

A) ray-finned fishes B) birds C) amphibians D) mammals

What must be true that fossils that the earliest tetrapods?

A) they should show evidence of internal fertilization. B) lock should show evidence that having developed shelled eggs. C) They must indicate limited adaptation to life top top land. D) They must be transitional creates with the fossils that chondrichthyans that lived at the exact same time. E) they should feature the faster indications the the figure of jaws.

Which the these space amniotes?

A) amphibians B) fishes C) mammals D) placental mammals just E) egg-laying mammals just

Why is the amniotic egg considered an important evolutionary breakthrough?

A) It has a shell that increases gas exchange. B) It enables deposition of egg in a terrestrial environment. C) the prolongs embryonic development. D) It offers insulation to maintain heat. E) that permits inner fertilization come be changed by outside fertilization.

Which of these characteristics added most to vertebrate success in fairly dry environments?

A) the shelled, amniotic egg B) the ability to keep a continuous body temperature C) two pairs that appendages D) bony scales E) a four-chambered love

Which the the following are the only extant animals that descended directly from dinosaurs?

A) lizards B) crocodiles C) snake D) bird E) tuataras

A trend first observed in the development of the earliest tetrapods was

A) the appearance of jaws. B) the illustration of bony vertebrae. C) feet v digits. D) the mineralization of the endoskeleton. E) the amniotic egg.

Among the invertebrate phyla, phylum Arthropoda is distinctive in own members the have

A) a cuticle. B) a ventral nerve cord. C) open circulation. D) wings. E) segmented bodies.

Arthropods got into land about 100 million years before vertebrates did so. This most plainly implies that

A) arthropods evolved prior to vertebrates did. B) extant terrestrial arthropods are better adapted to terrestrial life than room extant terrestrial vertebrates. C) ancestral arthropods must have been poorly adapted to aquatic life and thus competent a selective press to attack land. D) vertebrates evolved from arthropods. E) arthropods have actually had an ext time to coevolve v land plants than vertebrates have actually had.

Which of these would a paleontologist be most likely to do in stimulate to determine whether a fossil to represent a reptile or a mammal?

A) Look because that the existence of milk-producing glands. B) Look for the mammalian characteristics of a four-chambered heart and also a diaphragm. C) since mammals space eutherians, look at for evidence of a placenta. D) usage molecular analysis to look because that the protein keratin. E) examine the this to determine just how sharp or ground down they are.

In which vertebrates is fertilization specifically internal?

A) chondrichthyans, osteichthyans, and also mammals B) amphibians, mammals, and reptiles C) chondrichthyans, osteichthyans, and reptiles D) reptiles and mammals E) reptiles and also amphibians

Internal fertilization, leathery amniotic eggs, and skin the resists dry are attributes of which extant vertebrate group?

A) amphibians B) non-bird reptiles C) chondrichthyans D) mammals E) birds.

Organisms at which that the adhering to trophic levels raised the most due to the fact that of the activity of animals onto land?

A) herbivores and carnivores B) decomposers and also producers C) producers D) decomposers

The decline of cyanobacteria in the beforehand Cambrian oceans was most most likely related to

A) the activity of animals onto land. B) the evolution of land plants. C) boost in the number of predatory fish. D) an increase in organisms with suspension-feeding mouthparts. E) a decrease in the number of marine decomposers.

If all of the pets died in a huge region of one ocean, we would certainly expect boost in the

A) variety of filter feeders. B) variety of cyanobacteria. C) variety of decomposers. D) clarity that the ocean waters. E) temperature of the s waters.

Evidence shows that an genealogical finch types from south America landed on the Galapágos Islands and also formed many brand-new species, adapting come the diverse environments ~ above the islands. With the evolution of these brand-new bird species on the Galapágos Islands, we would suppose to discover a corresponding

A) boost in the variety of bird helminth on the Galapágos Islands. B) diminish in the variety of bird parasites on the Galapágos Islands. C) increase in the number of bird parasites in south America. D) decrease in the variety of bird helminth in south America. E) removed of bird helminth on the Galapágos Islands.

A new, sixth an international mass-extinction event shows up to be developing on planet today. The most most likely explanation for the dramatic loss of varieties is

A) climate change. B) herbal fluctuations in global temperatures and precipitation. C) the advancement of new types the viruses. D) human task that alters natural environments. E) decreases in atmospheric level of oxygen.

As a an outcome of harvesting a greater proportion of older and also larger cod and other fish types for food,

A) the variety of fish in these populations has actually increased dramatically. B) the age and size that fish reaching sexual maturity have actually decreased. C) many new species that predators have developed in these regions. D) the affected fish varieties have quit reproducing. E) many of the fish in these populations have actually started come reproduce asexually.

Which that the following characteristics distinguishes modern-day humans from other contemporary apes?

humans walk upright. Humans walk on 2 legs. Humans use an easy tools. People are qualified of symbolic thought. A) 2 and also 3 just B) 1, 2 and also 4 just C) 2, 3, and 4 only D) 1, 2, 3, and also 4 just

What is a primary, usual evolutionary attribute of every reptiles, mammals, and also birds?

A) this B) endothermic habits C) gastrovascular cavity D) amniotic egg

One necessary evolutionary readjust that developed with the climb of animals is

A) a adjust from a microbe-only environment to one of big producers, predators, and prey. B) the die out of cyanobacteria. C) a marine ecosystem prominence of sponges and cnidarians. D) a confirmed second common ancestor the animals.

If wild dogs take component in cooperative hunting, they will certainly likely have a much better outcome than if they hunting alone, especially if lock share the prey. The dogs the cooperate are raising the survival probability that one another. This is an instance of

A) parasitism. B) mutual selection. C) defensive adaptations. D) adaptive radiation.

Humans widely use pesticides top top plants together a means to control insect and also plant pests. However, pesticides room not selective in what castle kill, for this reason they often kill advantageous insect and also plant species as well. This unintentional repercussion favors plant and insect species that room pesticide resistant. This script is an instance of

A) human effects on evolution. B) mutual selection. C) human results on antibiotic resistance. D) mass extinction of tree species.

A student catches a ray-finned fish from the ocean and also notices that attached come its flank is an equally long, snakelike organism. The attached organism has no outside segmentation, no scales, a slimy substance on its surface, a ring mouth surrounded by a sucker, a tongue, and two small eyes. The student thinks it might be a marine hagfish or a lamprey. Which function excludes the organism from possibly being a lamprey?

A) elongated shape B) absence of scale C) a slimy substance on its surface ar D) ring mouth E) tongue

Using similarities in body symmetry and other anatomical attributes to assign an biology to a clade involves

cladistics based upon body plan. Molecular-based phylogeny. Morphology-based phylogeny. A) 1 just B) 2 just C) 3 just D) 1 and 2 just E) 1 and 3 only
*

Which of the following is a point of conflict in between the phylogenetic analyses gift in these two figures?

A) the partnership of taxa of segmented animals to taxa the nonsegmented animals B) the sponges are basal animals C) that chordates room deuterostomes D) the evolution relationship in between Nematoda and also Arthropoda
*

What is true in the molecular phylogeny (B) the is not true in the classic phylogeny (A)?

A) Deuterostomia is paraphyletic. B) To maintain Deuterostomia as a clade, some phyla had to be removed from it. C) Deuterostomia now contains the Acoela. D) It sail from the remainder of the Bilateria earlier than go the Acoela.
*

In the classic phylogeny (A), the phylum Platyhelminthes is illustrated as a sister taxon come the rest of the protostome phyla and also as having diverged earlier from the lineage that led to the remainder of the protostomes. In the molecule phylogeny (B), Platyhelminthes is depicted as a lophotrochozoan phylum. What probably brought about this change?

A) Platyhelminthes ceased to be well-known as true protostomes. B) The removed of the acoel flatworms (Acoela) indigenous the Platyhelminthes permitted the continuing to be flatworms come be clearly tied come the Lophotrochozoa. C) all Platyhelminthes must have a well-developed lophophore together their feeding apparatus. D) Platyhelminthes" close genetic ties come the arthropods came to be clear together their Hox gene sequences were studied.
*

What conclusion is noticeable from the data in Table 27.1?

A) Land animals have much more Hox genes than execute those the live in water. B) every bilaterian phyla have had actually the same level of development in your numbers the Hox C) Acoel flatworms must be expected to contain 7 Hox D) The expansion in number of Hox genes throughout vertebrate development cannot be explained merely by three duplications that the genealogical vertebrate Hox E) Extant insects all have seven Hox
*

All points being equal, i m sorry of this is the most basic explanation for the change in the number of Hox genes from the last common ancestor of insects and also vertebrates to ancestral vertebrates, as displayed in Table 27.1?

A) The occurrence of seven independent duplications of individual Hox B) The event of 14 live independence duplications of separation, personal, instance Hox genes C) The incident of two distinctive duplications of the whole seven-gene cluster, followed by the lose of one cluster. D) The event of a solitary duplication the the entire seven-gene cluster.

Which tree(s) has actually (have) been produced by emphasizing genomic features of placozoans?

A) I only B) II only C) III only D) I and also II

Which tree(s) has (have) been created by emphasizing the structural simplicity of placozoans?

A) I only B) II only C) III just D) II and III

Which tree(s) has (have) been created by emphasizing a protein discovered in placozoans?

A) I just B) II only C) III just D) I and III

Fishes that have actually swim bladders deserve to regulate your density and also thus your buoyancy. There room two varieties of swimming bladder: physostomous and also physoclistous. The ancestral version is the physostomous version, in i beg your pardon the swim bladder is linked to the esophagus via a short tube (Figure 27.2). The fish fills this version by swim to the surface, acquisition gulps that air, and also directing them right into the swimming bladder. Air is removed from this version by "belching." The physoclistous version is more derived and has lost its link to the esophagus. Instead, gas enters and also leaves the swimming bladder via distinct circulatory mechanisms within the wall of the swim bladder.

The existence of a swim bladder enables the typical ray-finned fish to stop swimming and still

A) effectively circulate its blood. B) be very maneuverable. C) use its swimming bladder together a respiratory organ. D) not sink.

Fishes that have actually swim bladders can regulate your density and thus your buoyancy. There are two varieties of swimming bladder: physostomous and also physoclistous. The ancestral version is the physostomous version, in which the swimming bladder is linked to the stomach via a quick tube (Figure 27.2). The fish fills this variation by swimming to the surface, taking gulps that air, and directing them into the swimming bladder. Wait is eliminated from this variation by "belching." The physoclistous version is more derived and has shed its link to the esophagus. Instead, gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swimming bladder.

If a physoclistous fish clears gas indigenous its swimming bladder, this fish"s thickness cannot actually change until the gas arrives at the

A) mouth. B) gills. C) skin. D) heart. E) anus.

Which graph appropriately depicts the relationship between the amount of gas in the swimming bladder and the density of the fish?

A) A B) B C) C D) D E) E

How perform a physoclistous fish and also a physotomous fish compare in terms of the lot of energy each need to use to keep its position (depth) in the water tower over the lengthy term?

A) a physoclistous fish uses an ext energy 보다 a physostomous fish B) a physostomous fish uses much more energy 보다 a physoclistous fish C) a physoclistous fish and a physostomous fish usage the same amount of energy D) a physoclistous fish originally uses more energy 보다 a physostomous fish yet then to reduce its energy use to be equal to the physostomous fish

Trichoplax adhaerens (Tp) is the just living types in the phylum Placozoa. People are about 1 mm broad and just 27 μm high, room irregularly shaped, and also consist the a full of about 2,000 cells, which space diploid (2n = 12). There room four types of cells, no one of i beg your pardon is a nerve or muscle cell, and none of which has a cell wall. They relocate using cilia, and also any "edge" deserve to lead. Tp feeds on maritime microbes, mostly unicellular eco-friendly algae, by crawling atop the algae and trapping it between its ventral surface and also the substrate. Enzymes room then secreted top top the algae, and also the resulting nutrients space absorbed. Tp sperm cells have never to be observed, nor have actually embryos previous the 64-cell (blastula) stage.

In i m sorry of the following ways is Tp similar to a typical animal?

Tp is multicellular. Tp lacks muscle and nerve cells. Tp has actually cilia. Tp lacks cabinet walls. Tp walk not have observable sperm cells. A) 1 and 2 just B) 1 and 3 just C) 1, 3, and 5 only D) 3, 4, and 5 only E) 1, 2, 3, 4, and also 5

Trichoplax adhaerens (Tp) is the just living species in the phylum Placozoa. People are around 1 mm wide and just 27 μm high, room irregularly shaped, and consist of a total of about 2,000 cells, which are diploid (2n = 12). There are four varieties of cells, nobody of i beg your pardon is a nerve or muscle cell, and also none the which has a cabinet wall. They relocate using cilia, and also any "edge" have the right to lead. Tp feeds on maritime microbes, mostly unicellular eco-friendly algae, through crawling atop the algae and also trapping it in between its ventral surface and the substrate. Enzymes space then secreted ~ above the algae, and also the result nutrients space absorbed. Tp sperm cells have actually never to be observed, nor have actually embryos past the 64-cell (blastula) stage.

On the communication of the information in the previous paragraph, which of this should be able to be it was observed in Tp?

A) the act of fertilization B) the procedure of gastrulation C) the presence of eggs D) A and also B just E) A, B and C

Trichoplax adhaerens (Tp) is the just living species in the phylum Placozoa. Individuals are about 1 mm broad and only 27 μm high, room irregularly shaped, and consist that a total of around 2,000 cells, which are diploid (2n = 12). There space four types of cells, none of which is a nerve or muscle cell, and none of which has actually a cabinet wall. They move using cilia, and also any "edge" deserve to lead. Tp feeds on maritime microbes, greatly unicellular eco-friendly algae, by crawling atop the algae and trapping it in between its ventral surface and also the substrate. Enzymes space then secreted onto the algae, and the resulting nutrients room absorbed. Tp sperm cells have actually never been observed, nor have actually embryos previous the 64-cell (blastula) stage.

Tp"s body symmetry appears to be many like the of

A) most sponges. B) cnidarians. C) worms. D) tetrapods.

An elementary school science teacher decided to liven increase the classroom with a saltwater aquarium. Knowing that saltwater aquaria deserve to be rather a hassle, the teacher conduct stepwise. First, the teacher conditioned the water. Next, the teacher chose to share the tank through various marine invertebrates, consisting of a sea star, a sponge, a sea urchin, a jellyfish, numerous hermit crabs, part sand dollars, and also an ectoproct. Last, she added some vertebrates — a parrotfish and also a clownfish. She arranged for everyday feedings the copepods and also feeder fish.

One day, Tommy (a college student in an undersupervised course of 40 5th graders) gained the advice to pet Nemo (the clownfish), who was swimming amongst the waving petals that a nice underwater "flower" that had a big hole in the middle of the petals. Tommy giggled ~ above finding that these petals feeling sticky. A few hours later, Tommy remained in the nurse"s office through nausea and also cramps. Microscopic examination that his fingers would certainly probably have revealed the existence of

A) this marks. B) spines. C) spicules. D) nematocysts. E) a radula.

An elementary college science teacher decided to liven increase the classroom v a saltwater aquarium. Knowing that saltwater aquaria can be rather a hassle, the teacher behavior stepwise. First, the teacher conditioned the water. Next, the teacher chose to share the tank with various naval invertebrates, including a sea star, a sponge, a sea urchin, a jellyfish, several hermit crabs, some sand dollars, and an ectoproct. Last, she included some vertebrates — a parrotfish and a clownfish. She arranged for day-to-day feedings that copepods and feeder fish.

Had the teacher wanted to allude out organisms that move and feed making use of the very same structural adaptation, the teacher should have actually chosen the

A) sponge and also the jellyfish. B) hermit crabs and also the ecotoprot. C) sea star, sea urchin, and sand dollars. D) vertebrates.

The many recently discovered phylum in the pet kingdom (1995) is the phylum Cycliophora. It consists of three types of tiny organisms that live in large numbers ~ above the outsides of the mouthparts and appendages that lobsters. As soon as in the feeding stage, a cycliophoran permanently attaches to the lobster via an adhesive disk and also collects scraps of food from its host"s feeding by catching the scraps in a current developed by a ring that cilia. Its body is sac-like and also has a U-shaped intestine that brings the anus close come the mouth. Cycliophorans are eucoelomate (have a human body cavity the is a coelom) and do no molt (though their organize does).

Which that these functions is least helpful in assigning the phylum Cycliophora come a clade of animals?

A) having actually a true coelom together a human body cavity B) having a human body symmetry the permits a U-shaped intestine C) doing not have ecdysis (molting) D) that is feeding device

The most recently discovered phylum in the pet kingdom (1995) is the phylum Cycliophora. It consists of three species of tiny organisms that live in huge numbers ~ above the outsides the the mouthparts and appendages that lobsters. When in the feeding stage, a cycliophoran permanently attaches to the lobster via one adhesive disk and collects scraps the food from its host"s feeding by catching the scraps in a current developed by a ring the cilia. Its human body is sac-like and has a U-shaped intestine the brings the anus close come the mouth. Cycliophorans space eucoelomate (have a body cavity the is a coelom) and do not molt (though their host does).

Basing her inferences on information in the previous paragraph, to which clade(s) should cycliophorans belong?

Eumetazoa Deuterostomia Bilateria Ecdysozoa Lophotrochozoa A) 1 only B) 1 and also 3 just C) 1, 3, and 5 just D) 2, 3, and also 4 only E) 2, 3, and also 5 just

The most recently found phylum in the animal kingdom (1995) is the phylum Cycliophora. It consists of three varieties of tiny organisms the live in large numbers top top the outsides the the mouthparts and also appendages of lobsters. When in the feeding stage, a cycliophoran permanently attaches come the lobster via an adhesive disk and also collects scraps the food indigenous its host"s feeding by capturing the scraps in a current developed by a ring of cilia. Its body is sac-like and has a U-shaped intestine that brings the anus close to the mouth. Cycliophorans are eucoelomate (have a human body cavity that is a coelom) and also do not molt (though their hold does).

See more: When You’Re Sleeping There’S No Lonely Times Just Dreams, When You’Re Sleeping There’S No Lonely Times

What is true of the feeding stage of cycliophorans?

it is chemoheterotrophic. The is sessile. Its tube feet allow it to feed efficiently. It has actually radial symmetry. A) 1 and 2 only B) 1 and 3 just C) 2 and also 4 only D) 1, 2, and 3 only E) 2, 3, and 4 only

The many recently discovered phylum in the pet kingdom (1995) is the phylum Cycliophora. It has three species of tiny organisms that live in huge numbers ~ above the outsides of the mouthparts and also appendages the lobsters. Once in the feeding stage, a cycliophoran permanently attaches come the lobster via an adhesive disk and also collects scraps the food indigenous its host"s feeding by catching the scraps in a current created by a ring of cilia. Its body is sac-like and has a U-shaped intestine that brings the anus close come the mouth. Cycliophorans room eucoelomate (have a human body cavity that is a coelom) and do no molt (though their organize does).

Cycliophorans have two species of larvae. One kind of larva is created when the digestive device of a mrs is impregnated by a male. The digestive device then collapses and develops into a larva, i beg your pardon swims away looking for a brand-new host ~ the surrounding female dies. I m sorry is the embryonic organization that is supposedly most necessary in creating this form of larva?

A) mesoderm B) ectoderm C) endoderm D) mantle

Which the the adhering to clades includes the greatest variety of animal species?

A) the vertebrates B) the bilaterians C) the deuterostomes D) the insects

Fossil steroid and molecular clock evidence suggests that pets originated

A) between 710 and 770 million years ago. B) much more than 100 million years prior to the oldest recognized fossils of big animals. C) during the Cambrian explosion. D) both A and also B

Which that the adhering to was probably the least essential factor in bringing about the Cambrian explosion?

A) the emergence of predator-prey relationships amongst animals B) the buildup of sufficient atmospheric oxygen to assistance the much more active management of mobile animals C) the activity of pets onto soil D) the beginning of Hox genes and other genetic changes affecting the regulation that developmental genes

Which that the following can be thought about the many recent usual ancestor of living tetrapods?

A) a sturdy-finned, shallow-water lobe-fin who appendages had actually skeletal supports comparable to those that terrestrial vertebrates B) an armored gnathostome v two bag of appendages C) very early ray-finned fish that emerged bony skeletal supports in its paired fins D) a salamander that had legs supported by a bony skeleton but moved with the side-to-side bending usual of fishes