Ap Bio Chapter 24

1. a. Speciation-- The origin of a juvenile species in growing. b. Ana divisorsis-- AKA phyletic organic evolution its the accumulation of changes that gradually a given species into a new species with diverse characteristics c. Clado agentsis-- AKA branching evolution- it is the splitting of a gene pool into two or more disjoint pools, which to each one give rise to one or more new species 2. -They define species as a population or collection of populations whose members have the potential to interbreed in spirit and kick upstairs fertile offspring but atomic number 18 unable to set about offspring with those in separate populations. They atomic number 18 linked by who they can reproduce with. 3. Prezygotic breastworks to upbringing impede mating or hinder fertilization. Postzygotic hindrances to reproduction embarrass an organism from developing and/or reproducing 4.

Habitat isolation - populations persist in different habitats and do not meet Prezygotic breakwater two populations occupy different habitats Temporal isolation: Prezygotic restraint two populations duplicate at different times of the day, month, assuage or year Behavioral isolation: Prezygotic obstacle familiar competition limits chance of mating Mechanical isolation: Prezygotic barricade sex organs are incompatible Gametic isolation: Prezygotic parapet Sperm cannot fertilize egg Reduced intercrossed viability: Postzygotic barrier genes from parents move and do not mix Reduced hybrid fertility: Postzygotic barrier chromosomes from parents do not ma! tch up Hybrid breakdown: Postzygotic barrier - some first gen hybrids are fertile but cannot mate with original species 5. a. Morphological species concept-Characterizes a species by its body shape, size, and other structural features. It applied to parthenogenetic and sexual organisms and can be useful without the information on gene flow. b. Paleontological species concept-Focuses on morphologically discrete species cognize only from the fossil record. many another(prenominal) species are...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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