The Core Chapter 10 Test Review

Which one of the following is a defining characteristic of animals but not of plants?

• Animals, but not plants, are autotrophs

• Animals, but not plants, are heterotrophs

• Animals, but not plants, are eukaryotes

• Animals, but not plants, are prokaryotes

Being a heterotroph means (a)   .

• making your own food from the sun

• making your own food from oxygen

• obtaining your food by eating other organisms

• obtaining your food by photosynthesis

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What happened during the Cambrian explosion?

• Many large volcanoes erupted.

• There was a large asteroid impact.

• There was a rapid diversification of animal forms.

• Animals first evolved from single-celled organisms.

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The first animals evolved from (a)   .

• protists

• plants

• bacteria

• archaea

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Most animals fall into one of how many phyla?

• 100

• 35

• 9

• 5

How many of the animal phyla include single-celled animals?

• 0

• 1

• 2

• 4

What defines radial symmetry?

• Any plane of symmetry passing through the center of the organism splits it into equal halves.

• Only four planes of symmetry passing through the center of the organism splits it into equal halves.

• Only one plane of symmetry splits the organism into equal halves.

• No planes of symmetry exist; the organism cannot be split into equal halves.

The first animals evolved _______.

• 6 thousand years ago

• 60 thousand years ago

• 600 thousand years ago

• 600 million years ago

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What do sponges and cnidarians have in common?

• Organization of cells into tissues

• Mobility

• Symmetry

• None of the above are characteristics that sponges and cnidarians share

Which of the following best describes sponges?

• They are asymmetrical, lack tissues, and do not move.

• They are symmetrical, lack tissues, and do not move.

• They are asymmetrical, have tissues, and do not move.

• They are symmetrical, have tissues, and do not move.

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