Lecture 3 - Lecture 3 Adaptation and NS o Are organism's...

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Lecture 3 Adaptation and NS o Are organism’s designed? o Sexual Selection Competition Sexual Dimorphism Secondary sexual characteristics o Agents of NS: predators, disease, environmental conditions, competition Competition: intraspecific; interspecific (leads to competitive exclusion) o NS: NS is Differential survival and reproduction within a pop., while… Adaptation is the response of the individual to be agents of selection Is also an anatomical, behavioral, biochemical, or genetic feature that enhances an individual’s ability to survive and reproduce Fitness is measure by the # of viable offspring. It’s dependent on adaptation and vice-versa. NS is manifest in populations (of selfish genes and individuals). Species evolve, but org.s adapt 2 Views Quantitative - differential survival and reproduction (genes or org.s) Qualitative – study biological purpose, adaptation (genes of orgs.) 3 Different Kidns of NS Stabilizing (shift towards the mean; less variation in pop.) Directional (shift in one direction)
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This note was uploaded on 04/02/2008 for the course LIFESCI 252-003-22 taught by Professor Greggraffin during the Winter '08 term at UCLA.

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Lecture 3 - Lecture 3 Adaptation and NS o Are organism's...

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