Biology 1001A Lecture Notes - Lecture 20: Ingroups And Outgroups, Autapomorphy, Synapomorphy

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Beth Mac Dougall Shackleton Tom Haffie

Document Summary

Just as many biologists are fooled by the flowerlike leaves, so are insects that come to pollinate the flowers. In this way, the rust interferes with fertilization of the plant: the rust also i(cid:374)hi(cid:271)its the for(cid:373)atio(cid:374) of the pla(cid:374)t"s o(cid:449)(cid:374) flo(cid:449)ers, (cid:373)i(cid:374)i(cid:373)izi(cid:374)g (cid:272)o(cid:374)fusio(cid:374) a(cid:373)o(cid:374)g pollinators. In some places with an abundance of water and sunlight, nitrogen for plants can be in short supply: here we find a diversity of ways that plants trap insects to directly (or indirectly) obtain nitrogen. Like people trying to catch insects (but perhaps not for their nitrogen), plants use different methods: flypaper traps have appeared in at least five evolutionary lines of plants and pitchers at least three. Insectivorous plants catch insects in sticky traps (flypaper), snap traps, and pitfall traps (pitchers) times. For the most part, carnivorous plants do not share a close common ancestor.