Question 1

A researcher wanted to determine if a sample of DNA belonged to an animal. What gene would provide evidence that the DNA came from an animal cell?

Accepted Answer

A)   Gene for ATP synthase
B)   Gene encoding the rubisco enzyme
C)   Genes for collagen
D)   Genes that initiate mitosis
E)   Genes for chitin cell wallsF) B) and D)
G) All of the above C

Question 2

Of the following combination of statements about protostomes and deuterostomes, which choice is correct?

Accepted Answer

A)   Protostomes are animals in which the mouth develops from the blastopore, and the anus or anal pore develops from the second opening. Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.
B)   Protostomes are animals in which the anus develops from the blastopore, and the mouth develops from the second opening. Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.
C)   Protostomes are animals in which the mouth develops from the blastopore, and the anus or anal pore develops from the second opening. Deuterostomes are animals in which the mouth develops from the blastopore and the anus develops secondarily later in their development.
D)   Protostomes are animals in which the mouth or anus develops from the blastopore, depending on the species. Deuterostomes are animals in which the mouth and anus develops from the blastopore, depending on the species.E) None of the above
F) All of the above

Question 3

Why are parasites so difficult to classify based on morphology only?

Accepted Answer

A)   Parasites are so small that they are hard to study.
B)   Convergent evolution often occurs due to the constraints of the parasitic lifestyle.
C)   Fully parasitic animals are all members of the same phylum.
D)   Parasitic animals are unicellular and have lost many of the typical animal features.E) None of the above
F) C) and D)

Question 4

Pinworm is spread by contact, and the worms cause severe itching around the anus. Why is it so common?

Accepted Answer

A)   The intense itch produces an intense desire to scratch.
B)   Sometime people don't wash their hands after scratching their peri-anal region.
C)   Insect vectors spread the disease.
D)   The eggs end up in the soil.E) B) and C)
F) A) and D) B

Question 5

Sea urchins and jellyfish are both radially symmetrical, but sea urchins and humans are much more closely related than sea urchins and jellyfish. Why is this true?

Accepted Answer

A)   Humans are radially symmetrical during most of their embryonic development.
B)   Sea urchins have bilaterally symmetrical larvae and exhibit radial cleavage.
C)   Jellyfish have bilaterally symmetrical, triploblastic larvae.
D)   Humans are descendents of sea urchins not jellyfish.E) B) and C)
F) A) and B)

Question 6

Can a blue crab find its identical twin?

Accepted Answer

A)   No, spiral cleavage is determinate.
B)   Yes, crab larvae reproduce via mitosis.
C)   Yes, the separation of embryonic cells is rare but not lethal.
D)   No, arthropods are deuterostomes and twinning only occurs in protostomes.E) A) and D)
F) None of the above

Question 7

Predict why a box jelly can eat fish while a sponge can only consume bacteria and other microscopic organic matter?

Accepted Answer

A)   Box jellies use intracellular digestion.
B)   Sponges lack venom in their stinging cells.
C)   Box jellies start digestion in their gastrovascular cavity.
D)   Sponges are too small to consume large prey items.E) None of the above
F) A) and D) C

Question 8

Animals are thought to have descended from choanoflagellate protists. Which poriferan cell type lends evidence to this claim?

Accepted Answer

A)   Gamete
B)   Choanocyte
C)   Spicule
D)   AmoebocyteE) A) and B)
F) C) and D)

Question 9

Is the group "invertebrates" a valid monophyletic group?

Accepted Answer

A)   Yes, because it includes all organisms without backbones.
B)   No, because the common ancestor to all the invertebrates is also an ancestor of the vertebrates.
C)   Yes, because only vertebrates are deuterostomes.
D)   No, because most animals are vertebrates.E) B) and C)
F) All of the above

Exam 23: Animal Diversity

A researcher wanted to determine if a sample of DNA belonged to an animal. What gene would provide evidence that the DNA came from an animal cell?

Correct Answer
verified
C

Of the following combination of statements about protostomes and deuterostomes, which choice is correct?

Correct Answer
verified

Why are parasites so difficult to classify based on morphology only?

Correct Answer
verified

Pinworm is spread by contact, and the worms cause severe itching around the anus. Why is it so common?

Correct Answer
verified
B

Sea urchins and jellyfish are both radially symmetrical, but sea urchins and humans are much more closely related than sea urchins and jellyfish. Why is this true?

Correct Answer
verified

Can a blue crab find its identical twin?

Correct Answer
verified

Predict why a box jelly can eat fish while a sponge can only consume bacteria and other microscopic organic matter?

Correct Answer
verified
C

Animals are thought to have descended from choanoflagellate protists. Which poriferan cell type lends evidence to this claim?

Correct Answer
verified

Is the group "invertebrates" a valid monophyletic group?

Correct Answer
verified

Exam 23: Animal Diversity

A researcher wanted to determine if a sample of DNA belonged to an animal. What gene would provide evidence that the DNA came from an animal cell?

Correct AnswerverifiedC

Of the following combination of statements about protostomes and deuterostomes, which choice is correct?

Correct AnswerverifiedShow Answer

Why are parasites so difficult to classify based on morphology only?

Correct AnswerverifiedShow Answer

Pinworm is spread by contact, and the worms cause severe itching around the anus. Why is it so common?

Correct AnswerverifiedB

Sea urchins and jellyfish are both radially symmetrical, but sea urchins and humans are much more closely related than sea urchins and jellyfish. Why is this true?

Correct AnswerverifiedShow Answer

Can a blue crab find its identical twin?

Correct AnswerverifiedShow Answer

Predict why a box jelly can eat fish while a sponge can only consume bacteria and other microscopic organic matter?

Correct AnswerverifiedC

Animals are thought to have descended from choanoflagellate protists. Which poriferan cell type lends evidence to this claim?

Correct AnswerverifiedShow Answer

Is the group "invertebrates" a valid monophyletic group?

Correct AnswerverifiedShow Answer

Correct Answer
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C

Correct Answer
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Correct Answer
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Correct Answer
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B

Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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Correct Answer
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