Term
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Definition
| progression of life in sedimentary layers, provides history of evolutionary tree, can be destroyed easily |
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Term
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Definition
| heritable changes over generations can give rise to new species |
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Term
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Definition
change within lineage= anagenesis
branching of lineage= cladogenesis
explains origin of diversity |
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Term
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Definition
| human modification of other species by selective breeding |
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Term
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Definition
organisms with features in between ancestors and modern descendants, change in many ways at once
ex. whales with hind limbs |
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Term
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Definition
similarity resulting from common ancestry, may differ in function.
3 types of structures |
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Term
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Definition
| adaption to different uses |
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Term
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Definition
| same function, separate origins |
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Term
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Definition
appearing independently
ex. birds and insect wings |
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Term
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Definition
remnants of homologous structures
ex. pelvic bones of whales, manatees |
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Term
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Definition
early developmental structures or events shared by related species.
vertebrate embryo ex. finger/toe development |
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Term
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Definition
similarity between DNA or protein sequence
closely related species have similar sequences
ex. hemoglobin |
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Term
| strong selective pressure |
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Definition
low chance of reproduction if unfit
-direct observation
1. food availability
2.predator behavior
3.toxins |
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