GGR217H5 Lecture Notes - Lecture 1: Leafcutter Ant, Frustum, Coevolution
Document Summary
What kind of challenges do animals living in aquatic environments share: difficulties moving. What kind of challenges do animals living in terrestrial environment share: dry all the time, more light, less dense, less viscous (no body support by buoyancy, oxygen easier to extract, no suspended nutrients. Environmental pressures on animal life change in each geological period. Symbiotic associations of leaf-cutter ants and fungi they cultivate. Y(cid:373)(cid:271)io(cid:374)t su(cid:272)(cid:272)ess (cid:862)li(cid:373)ited(cid:863) (cid:271)y 50 (cid:373)illio(cid:374) years of co-evolution. Every animal is different due to varying pressures of environment. Two animals may be similar to each other through shared common ancestry. Corn snakes have major alterations in hox gene expressions: a higher rate of segmentation in these snakes (more vertebrae) Anything not discussed in lectures not on test. Small one emptied in 23 seconds, while larger emptied in 46 seconds. Therefore empting of sand should take 8/4 = 2x more. Factors to consider: tip is gone, size.
