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Exam 17: Evolution and Diversity of Animals

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Question 31

Multiple Choice

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The embryonic germ layer of tissue in animals that develops into the skin and nervous system is the

A) pachyderm.
B) endoderm.
C) mesoderm.
D) protoderm.
E) ectoderm.

F) A) and C)
G) A) and E)

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Question 32

Multiple Choice

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A bony or cartilaginous structure that surrounds and protects the brain of chordates is a(an)

A) cranium.
B) notochord.
C) amnion.
D) vertebra.
E) jaw.

F) A) and B)
G) A) and C)

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Question 33

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Some animals are autotrophs.

Platyhelminthes include which of the following organisms?

A lancelet is a(an)

Which of the following is a jawless fish?

Scientists use mitochondrial DNA to track the migration of humans across the planet.After a group migrates away from their ancestral homeland,any mutations that occur are not mixed with those left in the ancestral population.Therefore,mitochondrial DNA samples taken from ____ would have the most unique mutations,representing the most recent population to migrate to a new area.

Which is a lobe-finned fish?

The free-swimming tunicate larva resembles a tadpole.Once it settles headfirst onto a solid surface,the tail and notochord disappear and the nerve cord shrinks to nearly nothing.The adults,which are usually sessile,retain only the pharyngeal slits.Neither adult nor larva is segmented.Tunicates do retain what trait as adults which makes them resemble other chordates?

A fluid-filled body cavity that forms completely within the mesoderm of animals is a

Which characteristic would exclude an animal from being an amphibian?

when asked to analyze a sample of marine life,you notice an animal which has an incomplete digestive tract,stinging cells,and which swims as a gently undulating bell.you conclude that you have found a cnidarian polyp.

Sea cucumbers and sea urchins belong to the phylum

When examining a picture of a jellyfish,you notice that a mirror placed in any orientation so that one end of the mirror touches the top of the jellyfish and the other end touches the mouth,the mirror forms the other half of the jellyfish.Therefore,you conclude that the jellyfish has

Which of the following is found in a group other than animals?

A skeleton has a foramen magnum near the rear of the skull;this indicates the skeletal remains may be those of a

Flatworms are very thin and can exchange materials across their surface.Flatworms lack which of the following anatomical systems?

An internal membrane in chordates that protects the developing fetus is the notochord.

Octopuses and squids are cephalopods and are members of which group?

Sponges belong to the phylum