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Unformatted text preview: 4/14/2010 • Pollen is “expensive” and plant cant afford to waste it o Earlier plants offered pollen as reward to insects o Now nectar is offered because it is less expensive (majority do this) o some plants don’t reward orchids attract bees and wasps by using the odor of the female sex pheromone When the male tries to mate with it the orchids splatters the pollen on it. The bee gets no reward. o Fig tree makes a cluster of flower (inflorescence) that look like a fruit. they offer wasps shelter and food for the young there is a 1 to 1 ratio between the species of the trees and wasps female wasp goes in the inflorescence hole and transfers polin • some aunts wait by the flower to eat the wasp The female goes in the flower. She is carrying fertilized eggs. She sticks her ovapositor into the flower ovary. at the same time she is pollinating the stigma • her young feed on the fruit she can’t put egg in ovaries that are to far down but the ovary is dusted with pollen anyways...
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This note was uploaded on 01/26/2012 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.
- Fall '08