Evolution Flashcards

0
Q

Define ontogeny

A

Sequential expression within an individual in response to environments similar, though not necessarily identical to the original selecting criteria

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1
Q

Define evolution

A

Sequential consolidation of gene modifications that occur during ontogeny and subsequently survive successive exposure to selection criteria at the population level

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2
Q

Monophyletic group

A

Includes a hypothetical common ancestor, plus all of the defendant species

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3
Q

Paraphyletic group

A

Includes some but not all descendant species from one or more common ancestor

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4
Q

Apomorphies

A

Derived morphological traits that carry reliable information about phylogenetic relationships

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5
Q

Plesiomorphies

A

Primitive morphological traits inherited from common but distant and typically shared by many other species

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6
Q

Homology

A

Shared ancestry between a pair of structures/genes, in different species

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7
Q

Analogy

A

Similar structures arise from separate evolutionary origins

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8
Q

Homoplasy

A

Characteristic shared by a set of species but is not present in common ancestor

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9
Q

Craniates Apomorphies:

A

Cranium
Tripartite brain
Liver and kidney(s)
Heart with 2 or more chambers

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10
Q

Vertebrate Apomorphies:

A

Craniate apomorphies and…

Vertebrae
Two vertical semicircular canals

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