CEG 2136 Quiz: CEG2136Quiz1Fall2012OddSol

• School: University of Ottawa
• Department: Computer Engineering
• Course: CEG 2136
• Professor: Voicu Groza

Document Summary

Janzen: ants get value from the acacia in the form of domiciles, extrafloral nectaries and beltian bodies. Remove ants and the tree dies. Add seeds of competitors, vines, herbivores (insect or large) and the ants defend the tree. Janzen asked why questions and used theory and experiments. Was interested in intereactions, phenology, conflicting interests. Ecology texts pigeonhole pollination as a mutualism (+/+) Pollination is characterized as a mutualism by literature. Pollination and seed dispersal may or not be mutualistic. Alternative framework from being - /- , +/- , or. +/+, focus on the mechanism! Pollen: an organism some diploid tissue. Pollen development: outer wall (exine) is hard and different species can be distinguished by the structure and inner wall (intine). The tube picks up cues to determine which way to grow out (sugar content or electric gradient). For a short time the tube provides its own nutrients (autotrophic) and continue growth depends on maternal (heterotrophic) resources.