A typical membrane lipid of archaea.

Diphytanyl moieties are 8 five-carbon isoprene groups condensed end-to-end.

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#Id: 8108

#XL - T Zoology

A typical membrane lipid of archaea.

Diphytanyl moieties are 8 five-carbon isoprene groups condensed end-to-end.

TLS Online TPP Program

#Id: 7053

#XL - T Zoology

Cope’s rule:  A proposed generalization that individual body size in animals tends to increase during evolution.

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#Id: 7054

#XL - T Zoology

Hitchhiking: Change in the frequency of an allele due to linkage with a selected allele at another locus.

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#Id: 7055

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Dollo’s law:  A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

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#Id: 7056

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Van Valen law - he found a surprising result: rather straight curves, implying that the probability of extinction is roughly constant.

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#Id: 7057

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Ockham’s principle - Principle of parsimony 

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#Id: 7058

#XL - T Zoology

The Forces of Evolution

mutation, 

genetic drift

gene flow or migration

selection.