33 Invertebrates Ap Biology Guide Answers

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29) A student observes a wormlike organism crawling about on dead organic matter. Later, the organism sheds its outer covering. One possibility is that the organism is a larval insect (like a maggot). However, it might be a member of the phylum , and one way to distinguish between the two possibilities is by looking for. A) Platyhelminthes; a cuticle of chitin B) Nematoda; an alimentary canal C) Annelida; a body cavity D) Nematoda; a circulatory system E) Annelida; muscle in the body wall. 43) A stalked, sessile marine organism has several feathery feeding structures surrounding an opening through which food enters. The organism could potentially be a cnidarian, a lophophorate, a tube-dwelling worm, a crustacean, or an echinoderm.

Read and Download 33 Invertebrates Ap Biology Guide Answers Free Ebooks in PDF format - ENTREPRENEURSHIP ROBERT D HISRICH SEVENTH EDITION ENTRANCE EXAM QUESTION.

Which of the following traits, if found in this organism, would allow the greatest certainty of identification? A) the presence of what seems to be radial symmetry B) a hard covering made partly of calcium carbonate C) a digestive system with mouth and anus separate from each other D) a water vascular system E) a nervous system. This nudibranch, a type of sea slug, has many reddish cerata on its dorsal surface, as well as two, white-tipped rhinophores located on the head. SEE IMAGE The nontaxonomic term sea slug encompasses a wide variety of marine gastropods. One feature they share as adults is the lack of a shell.

We might think, therefore, that they represent defenseless morsels for predators. In fact, sea slugs have multiple defenses.

Some sea slugs prey on sponges and concentrate sponge toxins in their tissues. Others feed on cnidarians, digesting everything except the nematocysts, which they then transfer to their own skins. Whereas the most brightly colored sea slugs are often highly toxic, others are nontoxic and mimic the coloration of the toxic species.

Their colors are mostly derived from pigments in their prey. There are also sea slugs that use their coloration to blend into their environments. 48) Sea slugs can obtain nematocysts by preying on sea A) anemones. D) cucumbers. This nudibranch, a type of sea slug, has many reddish cerata on its dorsal surface, as well as two, white-tipped rhinophores located on the head. SEE IMAGE The nontaxonomic term sea slug encompasses a wide variety of marine gastropods. One feature they share as adults is the lack of a shell.

We might think, therefore, that they represent defenseless morsels for predators. In fact, sea slugs have multiple defenses. Some sea slugs prey on sponges and concentrate sponge toxins in their tissues. Others feed on cnidarians, digesting everything except the nematocysts, which they then transfer to their own skins. Whereas the most brightly colored sea slugs are often highly toxic, others are nontoxic and mimic the coloration of the toxic species.

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Their colors are mostly derived from pigments in their prey. There are also sea slugs that use their coloration to blend into their environments. 49) Which structure do sea slugs use to feed on their prey? A) nematocysts B) a sharp beak C) an incurrent siphon D) a radula E) a mantle cavity. This nudibranch, a type of sea slug, has many reddish cerata on its dorsal surface, as well as two, white-tipped rhinophores located on the head.

SEE IMAGE The nontaxonomic term sea slug encompasses a wide variety of marine gastropods. One feature they share as adults is the lack of a shell. We might think, therefore, that they represent defenseless morsels for predators. In fact, sea slugs have multiple defenses.

Some sea slugs prey on sponges and concentrate sponge toxins in their tissues. Others feed on cnidarians, digesting everything except the nematocysts, which they then transfer to their own skins.

Whereas the most brightly colored sea slugs are often highly toxic, others are nontoxic and mimic the coloration of the toxic species. Their colors are mostly derived from pigments in their prey. There are also sea slugs that use their coloration to blend into their environments. 50) By which structures are nematocysts most likely to reach the skin of sea slugs?

A) the closed circulatory system B) branches of the intestine C) branches of the excurrent siphon D) branches of the nephridium E) branches of the pseudocoelom. This nudibranch, a type of sea slug, has many reddish cerata on its dorsal surface, as well as two, white-tipped rhinophores located on the head. SEE IMAGE The nontaxonomic term sea slug encompasses a wide variety of marine gastropods. One feature they share as adults is the lack of a shell.

Others feed on cnidarians, digesting everything except the nematocysts, which they then transfer to their own skins. Whereas the most brightly colored sea slugs are often highly toxic, others are nontoxic and mimic the coloration of the toxic species. Their colors are mostly derived from pigments in their prey. There are also sea slugs that use their coloration to blend into their environments. 51) The nematocysts of sea slugs should be most effective at protecting individual sea slugs from predation if the predators A) remove small bites of flesh from sea slugs, and have long-term memory. B) remove small bites of flesh from sea slugs, and have no long-term memory.

C) consume entire sea slugs in one gulp, and have no long-term memory. D) consume entire sea slugs in one gulp, and have long-term memory.

56) The sea slug, Elysia chorotica, has no nematocysts or dinoflagellates but, rather, has 'naked' chloroplasts in its skin. The chloroplasts are all that remain of the seaweed (Vaucheria sp.) that Elysia feeds upon. The chloroplasts are transferred to the skin; consequently, this slug is green. It spends most of its time basking in shallow water on the surface of seaweeds. How should we expect its chloroplasts to benefit the Elysia sea slug? Provide Elysia with fixed CO₂ 2. Provide Elysia with fixed N₂ 3.

Provide Elysia with protective coloration A) 1 only B) 2 only C) 3 only D) 1 and 3 E) 1, 2, and 3. The sea slug, Pteraeolidia ianthina, can harbor living dinoflagellates (photosynthetic protists) in its skin. These endosymbiotic dinoflagellates reproduce quickly enough to maintain their populations. Low populations do not affect the sea slugs very much, but high populations ( 5 x 105 cells/mg of sea slug protein) can promote sea slug survival. 57) If 100,000 sea slug cells together contain 1.0 mg of protein, then what is the minimum number of dinoflagellates per sea slug cell that constitutes a 'high,' and therefore beneficial, population? A) 1 cell B) 5 cells C) 10 cells D) 50 cells E) 100 cells. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 58) The claws on the foremost trunk segment of centipedes have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips.

60) The stingers of honeybees have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors.

Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 61) The spiracles and tracheae of insects have a function most similar to that of A) rhinophores.

Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 62) The antennae of insects have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange.

Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 63) The lateral flaps of planaria heads have a function most similar to that of A) rhinophores.

64) The parapodia of polychaetes have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips.

65) The spines of sea stars have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 66) The small, thin extensions of the skin on the aboral surfaces of sea stars have a function most similar to that of A) rhinophores. B) dorsal plummules. D) more than one of these. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 67) If nudibranch rhinophores are located at the anteriors of these sea slugs, then they contribute to the sea slugs' A) segmentation. B) lack of torsion. C) cephalization. D) identity as lophotrochozoans.

E) ability to successfully carry out a sessile lifestyle. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors.

Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 68) Nudibranchs usually have two rhinophores. However, if they had a single rhinophore, it could still carry out the function of two rhinophores, and with similar effectiveness, if this single rhinophore A) had two branches, one directed to the left, the other to the right. B) had two branches, one directed toward the head, the other directed toward the tail. C) was as long as two rhinophores placed end to end. D) had cilia whose power strokes directed water away from the surface of the slug.

33 Invertebrates Ap Biology Guide Answers

E) was located within the mantle cavity. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 69) The crown-of-thorns sea star, Acanthaster planci, preys on the flesh of live coral.

At times, these sea stars undergo poorly understood population explosions. What impact should such explosions have on those sea slugs that bear cerata (cerata contain nematocysts)? Population explosions of this sea star should A) benefit sea slugs by distracting their prey.

B) benefit sea slugs by helping subdue their prey. C) harm sea slugs by competing with them for food. D) harm sea slugs by consuming them as food. E) harm sea slugs by fouling the water with their feces.

Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange.

Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 70) The sharp, inch-long thorns of the crown-of-thorns sea star are its spines. These spines, unlike those of most other sea stars, contain a potent toxin. If it were discovered that crown-of-thorns sea stars do not make this toxin themselves, then the most likely alternative would be that this toxin is A) derived from the nematocysts of its prey. B) absorbed from the surrounding seawater. C) an endotoxin of cellulose-digesting bacteria that inhabit the sea star's digestive glands.

D) injected into individual thorns by mutualistic corals which live on the aboral surfaces of these sea stars. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 71) The crown-of-thorns sea star, Acanthaster planci, preys on the flesh of live coral. If coral animals are attacked by these sea stars, then what actually provides nutrition to the sea star, and which chemical (besides the toxin within their nematocysts) do the corals rely on for protection?

A) medusas; silica B) exoskeleton; silica C) exoskeleton; calcium carbonate D) polyps; calcium carbonate E) polyps; silica. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 72) The reason their exoskeletons cannot protect the corals from sea stars is that the sea star A) is immune to the toxin of the nematocysts.

B) thorns are sharp and toxic. C) tubefeet act as tiny syringes that suck the corals out of their exoskeletons. D) stomach can be everted, and can release digestive juices directly onto the corals. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces. Rhinophores are paired structures, located close to the head, which bear many chemoreceptors.

Dorsal plummules, usually located posteriorly, perform respiratory gas exchange. Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 73) A natural predator of the crown-of-thorns sea star is a mollusc called the Giant Triton, Charonia tritonis. If the triton uses a radula to saw into the sea star, then to which clade should the triton belong? A) chitons B) bivalves C) gastropods D) cephalopods. Nudibranchs, a type of predatory sea slug, can have various protuberances (i.e., extensions) on their dorsal surfaces.

Rhinophores are paired structures, located close to the head, which bear many chemoreceptors. Dorsal plummules, usually located posteriorly, perform respiratory gas exchange.

Cerata usually cover much of the dorsal surface and contain nematocysts at their tips. 74) Which human profession is most analogous to the lifestyle of the sea slugs described in this scenario? A) physician B) pirate C) pharmacist D) plumber E) painter. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly 'jet' through the water. Watching further, she is able to conclude that the 'mystery organisms' are ambush predators, and their prey includes everything from insects to small fish and tadpoles.

75) From this description, one can conclude that the organisms that have caught Sarah's attention are A) insects. B) crustaceans. C) aquatic spiders.

D) myriapods. E) eurypterids. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly 'jet' through the water.

Watching further, she is able to conclude that the 'mystery organisms' are ambush predators, and their prey includes everything from insects to small fish and tadpoles. 76) Sarah noticed the presence of many empty exoskeletons attached to emergent vegetation. These exoskeletons looked exactly like those of the largest of the 'mystery organisms' she had seen in the pond. They also looked similar to the bodies of the dragonflies that patrolled the surface of the pond. If Sarah had learned a lot from her college biology class, what should she have concluded about the mysterious pond organisms? A) They are larval dragonflies, destined to undergo incomplete metamorphosis.

B) They are larval dragonflies, destined to undergo complete metamorphosis. C) They are adult dragonflies, so old that they can no longer fly, have fallen into the pond, but have not yet drowned. D) They are adult dragonflies that must, like many amphibian species, return to water in order to mate. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer.

One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly 'jet' through the water. Watching further, she is able to conclude that the 'mystery organisms' are ambush predators, and their prey includes everything from insects to small fish and tadpoles. 77) If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures, except A) antennae. B) an open circulatory system. C) an exoskeleton of chitin. D) complex eyes.

E) sex organs. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly 'jet' through the water. Watching further, she is able to conclude that the 'mystery organisms' are ambush predators, and their prey includes everything from insects to small fish and tadpoles. 78) Sarah observed that the mystery pond organisms never come up to the pond's surface.

If she catches one of these organisms and observes closely, perhaps dissecting the organism, she should find A) gills. B) spiracles. D) book lungs. A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly 'jet' through the water.

Watching further, she is able to conclude that the 'mystery organisms' are ambush predators, and their prey includes everything from insects to small fish and tadpoles. 79) Sarah had learned that ancestral (Carboniferous era) dragonfly species were much larger than extant dragonfly species are, with wingspans of 70 cm. This struck her as odd, because she had also learned that one of the things that keeps insects small is their relatively inefficient respiratory system. Which two hypotheses might help account for the large size of ancestral dragonflies? 1.If the atmosphere during the Carboniferous era had featured a higher oxygen content than the modern atmosphere, then the tracheae might have been a sufficient means for oxygen delivery to the interior tissues. If large size was a drawback, then the large dragonflies underwent extinction, which explains why all extant dragonflies are smaller. If the ancestral dragonflies had possessed muscles that permitted effective ventilation of the tracheae, then the tracheae might have been a sufficient means for oxygen delivery to the interior tissues.

If ancestral dragonflies existed during greenhouse conditions, then they must have survived by decreasing their activity levels, such as no longer capturing prey in flight. Thus, for them, an ineffective respiratory system was sufficient. A) 1 and 2 B) 1 and 3 C) 1 and 4 D) 2 and 3 E) 2 and 4.

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates–a parrotfish and a clownfish.

She arranged for daily feedings of copepods and feeder fish 80) One day, little Tommy (a student in an undersupervised class of 40 fifth graders) got the urge to pet Nemo (the clownfish), who was swimming among the waving petals of a pretty underwater 'flower' that had a big hole in the midst of the petals. Tommy giggled upon finding that these petals felt sticky. A few hours later, Tommy was in the nurse's office with nausea and cramps.

Microscopic examination of his fingers would probably have revealed the presence of A) teeth marks. D) nematocysts. An elementary school science teacher decided to liven up the classroom with a saltwater aquarium.

Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties.

Lastly, she added some vertebrates–a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish 81) How many of the following organisms possess bilateral symmetry as adults? Echinoderm 4. Sea anemones 5. Ectoprocts A) one of these B) two of these C) three of these D) four of these E) five of these.

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise.

First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates–a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish 82) If the teacher wanted to show the students what a lophophore is and how it works, the teacher would point out a feeding A) hydra.

D) gastropod. E) ectoproct.

Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates–a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish 83) The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bivalves alive, the teacher would have to remove the A) sea anemones. C) gastropods.

D) ectoprocts. E) parrotfish. An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise.

First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates–a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish 84) If the teacher had used a dissecting microscope to examine the outer surfaces of the empty bivalve shells, the teacher would probably have seen marks that had been left by A) jaws. B) nematocysts. D) a lophophore. E) a madreporite.

She arranged for daily feedings of copepods and feeder fish 85) The teacher was unaware of the difference between suspension feeding and predation. The teacher thought that providing live copepods (2 mm long) and feeder fish (2 cm long) would satisfy the dietary needs of all of the organisms. Consequently, which two organisms would have been among the first to starve to death (assuming they lack photosynthetic endosymbionts)? A) sponges and corals B) sea stars and sponges C) shrimp and bivalves D) corals and bivalves E) bivalves and sponges. An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise.

First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates–a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish 86) If the teacher had wanted to demonstrate that some invertebrates possess a closed circulatory system, the teacher should have removed and dissected a A) mollusc. D) polychaete. E) parrotfish. An elementary school science teacher decided to liven up the classroom with a saltwater aquarium.

She arranged for daily feedings of copepods and feeder fish 87) Had the teacher wanted to point out organisms that belong to the most successful animal phylum, the teacher should have chosen the A) bivalves and gastropods. B) sea anemones and hydra. C) shrimp and copepods. D) polychaete. 89) The teacher and class were especially saddened when the colonial hydrozoan died. They had watched it carefully, and the unfortunate creature never even got to produce offspring by budding. Yet, everyone was elated when Tommy (now recovered) noticed a small colonial hydrozoan growing in a part of the tank far from the location of the original colony.

The teacher was apparently unaware that these hydrozoans exhibit A) spontaneous generation. B) abiogenesis. C) alternation of generations.

E) a medusa stage.