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True/False
Indicate whether the sentence or statement is true or false.
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1. |
A tissue is a group of dissimilar cells that are organized into a functional unit.
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2. |
The development of a particular animal’s body plan depends on the animal’s environment, rather than on the genetic information it carries.
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3. |
Flatworms are bilaterally symmetrical and cephalized.
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4. |
The fluid in the body cavity of an animal acts as a medium of transport for nutrients and wastes.
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5. |
All chordates retain their postanal tail in their adult life.
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6. |
Most invertebrates have kidneys that filter waste products from the blood.
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7. |
Terrestrial animals have a protective outer covering that helps prevent excessive water loss.
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8. |
Segmentation is evident in vertebrates in the repeating bony units of their backbones and ribs.
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9. |
During spiral cleavage, each cell of the blastula rests directly above or below an adjacent cell.
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10. |
In a cnidarian, endoderm forms the outer tissue and nervous system.
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Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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11. |
A group of similar cells organized into a functional unit is called
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a.
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a nervous system.
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c.
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a tissue.
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b.
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specialized cells.
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d.
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an organ.
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12. |
Most animals have a head that is located at the ____ end of their body and a tail that is located at the ____ end of their body.
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a.
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ventral; dorsal
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c.
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anterior; posterior
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b.
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dorsal; ventral
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d.
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posterior; anterior
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13. |
Refer to the illustration above. The organism labeled “B” in the diagram
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a.
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is asymmetrical.
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c.
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exhibits radial symmetry.
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b.
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is bilaterally symmetrical.
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d.
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has reverse symmetry.
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14. |
Refer to the illustration above. The organism labeled “A” in the diagram
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a.
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has no symmetry.
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c.
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exhibits radial symmetry.
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b.
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is bilaterally symmetrical.
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d.
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has reverse symmetry.
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15. |
Which of the following is found in vertebrates but not in invertebrates?
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a.
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dorsal nerve cord
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c.
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three germ layers
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b.
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coelom
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d.
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bilateral symmetry
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16. |
A characteristic shared by all chordates at some stage of their development is
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a.
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a dorsal hollow nerve cord.
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c.
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pharyngeal pouches.
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b.
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a notochord.
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d.
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All of the above
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17. |
Which of the following is not a characteristic of the largest phylum of invertebrates, the arthropods?
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a.
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segmentation
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c.
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closed circulatory system
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b.
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exoskeleton
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d.
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digestive tract
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18. |
The acoelomate body type is exemplified by
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a.
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flatworms.
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c.
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mollusks.
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b.
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roundworms.
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d.
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annelids.
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19. |
Which of the following is an incorrect match?
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a.
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ectoderm—nervous system
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c.
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endoderm—muscular system
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b.
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mesoderm—skeletal system
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d.
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endoderm—digestive system
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The diagrams below are cross sections of three types of animal bodies.
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20. |
Refer to the illustration above. Humans have the type of body cavity shown in diagram
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a.
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“A.”
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c.
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“C.”
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b.
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“B.”
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d.
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None of the above
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