Ch 24 - The Origin of Species (1 slide per page)-1

3 campbell et al 9th ed post zygote 25 25 prezygotic

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Unformatted text preview: adult Pre-zygote Figure 24.3 (Campbell et al 9th ed) Post-zygote 25 25 Prezygotic Reproductive Barriers 1. Habitat isolation 2 species live in the same general area but in different habitats Encounter each other rarely or never e.g. water vs land snakes e.g. Savanna vs forest elephant 26 26 Prezygotic Reproductive Barriers 2. Temporal isolation 2 species breed at different times of day, seasons, years Spotted skunks: Eastern: late winter Western: late summer Mating Activity Wood Frog March 1 Leopard Frog April 1 May 1 27 27 Prezygotic Reproductive Barriers 3. Behavioral isolation - Species-specific signals and behaviors to attract mates e.g. green lacewing calls e.g. firefly signals e.g. High-step dance in courtship among blue-footed boobies 28 28 Prezygotic Reproductive Barriers 4. Mechanical isolation anatomical incompatibility no sperm transfer e.g. snail shells spiral opposite & genitals don’t align Figure 24.19 (Campbell et al...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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