Term
| allantois (eh-LAN-tuh-wiss) |
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Definition
| An embryonic support membrane found in some vertebrates that functions in the elimination of wastes. |
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Definition
| A liquid-filled sac that contains the developing embryo of some vertebrate animals. |
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Term
| amniotic egg (am-nee-AH-tik) |
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Definition
| An egg covered by a protective shell and containing a liquid-filled sac called the amnion. |
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Definition
| The hard dorsal covering of the bodies of animals such as arthropods and turtles. |
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Definition
| An embryonic support membrane found in some vertebrates that functions in gas exchange. |
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Definition
| An evolutionary process in which similar selective pressures bring about similar adaptations in unrelated groups of animals. |
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Definition
| One of two different groups of animal that have evolved independently along the same lines in similar habitats and that therefore display similar adaptations. |
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Term
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Definition
| A phosphate-rich manure produced by birds. |
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Term
| gular pouch (GYOO-ler; GUH-ler) |
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Definition
| A sac of skin that hangs between the flexible bones of a pelican’s lower mandible. |
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Definition
| Paired penises that are characteristic of snakes and lizards. |
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Definition
| A tough protein found in mammalian hair and nails and in the baleen of cetaceans. |
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Definition
| The ventral surface of a turtle’s shell. |
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Definition
| See turtle exclusion device. |
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Term
| turtle exclusion device (T.E.D.) |
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Definition
| A grate that is placed in shrimp trawls to direct sea turtles out of the net so they won’t drown. |
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Term
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Definition
| A saclike structure in amniotic eggs that contains a supply of food in the form of yolk. |
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