PSYB30H3 Lecture Notes - Lecture 2: Exaptation, Pleistocene, Natural Selection
Document Summary
Selection our design impacts our rates of reproduction; different (cid:1) Variation in design ie species/organisms have differences (cid:1) (cid:1) designs different reproduction. Natural selection: evolution of adaptive characteristics because of the survival benefits i. e giraffe; longer necks survive (cid:1) Evolution of adaptive characteristics because of the reproductive benefits. Intrasexual competition intra=within; competition within the given sex ie stags" antlers serve to compete for females. Intersexual competition competition between the given sex ie peacocks feathers (cid:1) Adaptations (evidence of special design) design property selected and coordinated towards solving a recurrent problem in the environments. Spandrels (by-products) linked to another adaption or adaptive properties and gets incidentally incorporated into the design; ie earlobes. Random effects noise in the system; variation in ear lobe size (cid:1) Suspiciously functional long necks of giraffes serves a s. f purpose to get leaves. Condensed records of ancestral conditions biologically economical, (cid:1) efficient, designed specifically for a function.
