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Definition
| Hole in tail above notochord |
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| Hole in vertebrae below notochord |
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| Developed binomial nomenclature but did not believe in evolution |
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| First proponent of evolution, but incorrectly identified mechanism of it. |
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| Collected specimens in South America and Asia. Wrote paper on natural selection and sent it to Darwin. |
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Definition
| change in gene frequency over generations |
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| differential survival and reproduction of individuals within' population |
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| trait in two organisms because of a common ancestor |
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| Trait in 2 organisms that perform a similar function but aren't necessarily evolutionarily related |
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| similar in physical appearance but not necessarily related. (subset of analogy) |
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Definition
| action or property of the part. (What does it do?) |
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| "how is this part used in the environment?" |
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| Structure/behavior possesses a necc. form and function before the biological role arises. (feathers on birds.) |
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| Classification under life. (domain, kingdom, etc) For example Reptiles. |
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| An evolutionary lineage including an ancestor and all its descendants. |
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| an ancestoral (not recently evolved) trait relative to the thing. (for example gills in humans) |
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| A newly evolved trait (for example lungs in lungfish?) |
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| a clade (evolutionary lineage including all the descendants) |
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| an incomplete clade resulting from non-inclusion of descendants |
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| A paraphyletic group characterized by features that aren't homologous. (bats and birds for example) |
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Definition
| 4th most common. Arthropoda>Nematoda>Mollusca |
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Term
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Definition
is rigid stricture that allows muscle attachment and propulsion. No bony structure yet. It is liquid filled and therefor hydrostatic.
Collagenous sheath makes it rigid.
Vacuoles in the cells.
Muscle contraction can allow animals to swim with their tail. |
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Term
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Definition
Function in locomotion
Extension of notochord, and muscles, past the anus, probably an important preadaptation.
Easier to swim with tail.
Is the post-anal tail a preadaptation? |
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Term
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Definition
Dorsal to notochord
Hollow- due to invagination- no known benefit to it being hollow |
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