BIOL 1202 Study Guide - Chromosome, Starch, Gamete

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2 Jul 2014
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Concept 24. 1: the biological species concept emphasizes reproductive isolation: species: lating for kind or appearance . Speciation: dependent on, reproductive isolation, genetic divergence. Figure 24. 9: the existence of biological factors that impede members of two species from producing, prezygotic barriers: prevent egg and sperm from coming together, postzygotic barriers: two species are incompatible and produce an offspring that is not. Reproductive isolation viable, fertile offspring viable: zygote: fertilized egg. Impede mating between species or hinder the fertilization of ova if members of different species attempt to mate. Postzygotic barriers: often prevents the hybrid zygote from developing into a viable, fertile adult. Clicker question: two species of pine are found in the same habitat, but release pollen at different times during the year. Concept 24. 2: speciation can take place with or without geographic separation: speciation can occur in two ways, allopatric speciation, sympatric speciation.

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