Biology 1002B Lecture Notes - Lecture 1: Zoospore, Homo Sapiens, Chlamydomonas

• School: Western University
• Department: Biology
• Course: Biology 1002B
• Professor: Tom Haffie

Document Summary

Chlamydomonas around 1 micron: typical eukaryotic cell. Single cell, has flagella so can float around, 10 microns long (typical bacteria. Has many fundamental traits that a human has; the most important trait being that it is photosynthetic. On a tree, chlamydomonas diverged very early on, so shares fundamental traits with humans. When referring to chlamy, it is referring to the haploid zoospores. When living gets tough, some of the zoospores behave like gametes, fertilizing one another to make zygotes: in this way, sexual fertilization is a response to environmental stress to produce more diversity in the population. Chlamy falls between e. coli and homo sapiens in terms of genome size. Main theme in the course: evolution of multicellularity. Chlamy is at point a in the figure; volvox is at point f in the figure. The eyespot can trigger chlamy to move in certain directions. When light is present, the channel/pore opens up so calcium ions and protons can.