LIFESCI 2D03 Chapter Notes - Chapter 3: Proximate And Ultimate Causation, Endocrine System

73 views2 pages

Document Summary

Ultimate causation is when a trait has formed due to evolution. In proximate causation we answer questions like what and how. In proximate causation we are working with factors that are affecting the organism here and now- within it"s lifespan, no history or future is considered. Example: male aggression has been selected for scavenging (ultimate) while it is also selected for mate securing during mating season (proximate) Proximate analysis will help us understand how evolution has helped shape human aggression. Geoff hill worked on house finches (carpodacus mexicanuus) He started his experiment knowing that the coloration of the bird"s feather is due to carotenoid - color pigments ingested by birds. Meaning they completely rely on their diet for their coloration. Which meant that coloration of their plumage was due to development differences in what the males ate as they matured. One set of female birds were fed a normal apple and the other set were fed carotenoid.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions