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AP Biology glossary of key terms with definitions, must-know facts, ... AP Biology. Unit 1 – Chemistry of Life. Unit 2 – Cell Structure and Function.
Define evolution broadly and then give a narrower definition, as discussed in the overview. Descent with modification; the idea that living species are descendants of ancestral species that were different from the present-day ones. Evolution is also defined as the change in the genetic composition of a population from generation to generation.
A learning objective merges required content with one or more of the seven science practices. The process of evolution drives the diversity and unity of life. Change in the genetic makeup of a population over time is evolution. 1.A.2 Natural selection acts on phenotypic variations in populations.
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comparative anatomy. Comparative anatomy is the study of similarities and differences in the anatomy of different species. It is closely related to evolutionary biology and phylogeny (the evolution of species). Comparative anatomy has long served as evidence for evolution; it indicates that various organisms share a common ancestor.
1) morphological differences prevent mating. 2) Shells of 2 snails spiral different ways and so genital openings do not align. Explanation and example of Gametic isolation. 1) Sperm of 1 species cannot fertilize egg of other. 2) Red and purple sea urchins have different proteins on sperm and egg. Explanation and example of reduced hybrid viability.
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