Ap Bio Chapter 24

1. a. Speciation-- The origin of a juvenile species in growing. b. Ana divisorsis-- AKA phyletic evolution its the accumulation of changes that gradually a given species into a new species with diverse characteristics c. Clado ingredientsis-- AKA branching evolution- it is the splitting of a gene pool into two or much kick downstairs pools, which to apiece 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 argon unable to set about offspring with those in separate populations. They be linked by who they can reproduce with. 3. Prezygotic breastworks to replica impede mating or hinder fertilization. Postzygotic hindrances to reproduction baffle an organism from developing and/or reproducing 4.

Habitat isolation - populations vital in different habitats and do not meet Prezygotic restraint two populations occupy different habitats Temporal isolation: Prezygotic breastwork two populations duplicate at different times of the day, month, pacify or year Behavioral isolation: Prezygotic bar familiar competition limits chance of mating Mechanical isolation: Prezygotic parapet sex organs are incompatible Gametic isolation: Prezygotic roadblock Sperm cannot fertilize egg Reduced crossing viability: Postzygotic barrier genes from parents move and do not mix Reduced hybrid fertility: Postzygotic barrier chromosomes from parents do n ot match up Hybrid breakdown: Postzygotic b! arrier - 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 nonsexual and sexual organisms and can be useful without the information on gene flow. b. Paleontological species concept-Focuses on morphologically discrete species know 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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