ANT 301 Chapter Notes - Chapter 1 Darwin's Postulates 1)...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 1 Darwin's Postulates 1) ability of a population to expand is infinite, but ability to support populations is finite (struggle for existence) 2) variation in populations 3) variation is inherited Natural selection- evolution by variation and selective retention, results from competition among individuals not among species Morphology- an organism's size, shape, and composition Stabilizing equilibrium- process that produces an equilibrium within a populations Essentialism- pre-Darwinian view Species- dynamic population of individuals Individual selection -selection produces adaptations that benefit individuals but may not benefit the population -selection often leads to changes in behavior that inc. the reprod.success of individuals but decrease the average reprod.success of the population -fecundity- ability to produce offspring -Continuous variation- ex., distr. Of heights , essential for the evolution of complex adaptations -discontinuous variation- no intermediates -achondroplasia- causes affected individuals to be much shorter than other people -intermediate steps are favored by selection -placental mammals- nourish their young in the uterus during long pregnancies
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/17/2010 for the course ANT 301 taught by Professor Reed during the Spring '08 term at University of Texas at Austin.

Page1 / 2

ANT 301 Chapter Notes - Chapter 1 Darwin's Postulates 1)...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online