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| 1 | |
Protists called _________ were probably the ancestors of sponges and may have been the ancestors of all animals. |
| | A) | nematocysts |
| | B) | cnidarians |
| | C) | cnidocytes |
| | D) | choanoflagellates |
| | E) | ectoderms |
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| 2 | |
Flatworms have a very simple reproductive system. |
| | A) | True |
| | B) | False |
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| 3 | |
Which of the following is a monotreme? |
| | A) | zebra |
| | B) | kangaroo |
| | C) | duck-billed platypus |
| | D) | whale |
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| 4 | |
Arthropods have not been able to achieve great size because ________________. |
| | A) | the type of organ systems they possess could not support such a development. |
| | B) | they would be unable to successfully reproduce. |
| | C) | chitin is brittle and must be thick to bear the pull of muscles. |
| | D) | their vision is not good enough to hunt larger prey. |
| | E) | none of the above |
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| 5 | |
The most successful animals are the ____________. |
| | A) | mammals |
| | B) | birds |
| | C) | arthropods |
| | D) | reptiles |
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| 6 | |
One property that sponges share in common with many other animals is ____________. |
| | A) | a life cycle that involves alternation of generations. |
| | B) | a free-swimming medusa in its life cycle. |
| | C) | cell recognition. |
| | D) | the ability to digest cellulose. |
| | E) | none of the above |
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| 7 | |
The cnidarians have which of the following evolutionary advances over the sponges? |
| | A) | bilateral symmetry |
| | B) | cephalization |
| | C) | a life cycle involving a dominant haploid form |
| | D) | extracellular digestion |
| | E) | a nonmotile mature form |
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| 8 | |
Which of the following is an example of an organism with the medusae body form? |
| | A) | a sponge |
| | B) | a hydra |
| | C) | a coral |
| | D) | an amoeba |
| | E) | a jellyfish |
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| 9 | |
Cnidarians ______________________. |
| | A) | exist only as medusae in their life cycle. |
| | B) | exist only as polyps in their life cycle. |
| | C) | alternate between a polyp and a medusa during their life cycle. |
| | D) | may exist as medusae or polyps or alternate between those forms in their life cycle. |
| | E) | none of the above |
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| 10 | |
Cephalization is _____________________. |
| | A) | an evolutionary trend in the cnidarians. |
| | B) | the evolution of a head. |
| | C) | the lack of a distinctive head seen in the primitive animal phyla. |
| | D) | the trend towards bilateral symmetry seen in the chordates. |
| | E) | missing in many of the animal phyla. |
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| 11 | |
An example of an animal with a pseudocoelomate body is (are) ____________. |
| | A) | hydra. |
| | B) | planaria. |
| | C) | rotifers. |
| | D) | coral. |
| | E) | jellyfish. |
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| 12 | |
A radula is ____________________. |
| | A) | a sharp structure that is injected into the prey of a mollusk. |
| | B) | a protective coating made of calcium carbonate on sponges. |
| | C) | a small, internal shell found in cephalopods. |
| | D) | a rasping, tongue-like organ in mollusks. |
| | E) | necessary for mollusks to be motile. |
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| 13 | |
The segments of annelids are _____________________. |
| | A) | actually one large unit internally. |
| | B) | partitioned internally. |
| | C) | specialized for different functions. |
| | D) | not present in all species. |
| | E) | both b and c |
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| 14 | |
Most _______________ are vertebrates that have a well-defined head and backbone, plus an internal skeleton made up of bone or cartilage. |
| | A) | chordates |
| | B) | arthropods |
| | C) | echinoderms |
| | D) | mollusks |
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| 15 | |
Sharks are the most successful of all fishes. |
| | A) | True |
| | B) | False |
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| 16 | |
Before amphibians could be successful on land, they had to develop __________________. |
| | A) | a more efficient swim bladder |
| | B) | cutaneous respiration and lungs |
| | C) | gills. |
| | D) | shelled eggs. |
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| 17 | |
Archaeopteryx had which key birdlike features? |
| | A) | hollow bones |
| | B) | feathers |
| | C) | a wishbone |
| | D) | b and c only |
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| 18 | |
A characteristic shared by all mammals is _______________. |
| | A) | mammary glands. |
| | B) | giving birth to live young. |
| | C) | hooves. |
| | D) | pouches. |
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| 19 | |
Which of the following is the correct order, from largest to smallest? |
| | A) | epochs, eras, periods, ages |
| | B) | ages, eras, epochs, periods |
| | C) | periods, epochs, ages, eras |
| | D) | eras, periods, epochs, ages |
| | E) | ages, epochs, periods, eras |
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| 20 | |
A swim bladder allows a fish to ___________________. |
| | A) | regulate its water content in seawater. |
| | B) | regulate its salt content in seawater. |
| | C) | regulate its salt content in freshwater. |
| | D) | control its buoyancy in water. |
| | E) | tolerate changes in water pressure. |
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