BIOL108 Lecture Notes - Lecture 18: Blastocoel, Chemotroph, Gastrulation

• School: University of Alberta
• Department: Biology (Biological Sciences)
• Course: BIOL108
• Professor: Lien Luong

Document Summary

No expectations to memorize the timeline first chordates in the 550~500 mya two major extinctions we need to know first one. Occurred during the permian period (just before the dinosaurs) loss of 60% of all families, ~90% of all marine species. Occurred at the end of the cretaceous period loss of 40% of all families, including dinosaurs. Bodies & cells held together by structural proteins such as collagen lack cell walls (unlike plants & fungi) Creates a matrix that links the cells together. Unique nervous & muscle tissue that define animals. Confers the ability to move! tissues: groups of cells that have a common function / similar structure & function. Note: true tissues separate from other tissues by a membranous layers. Chemoheterotrophic; cannot make own carbon-based food source = must consume other organisms. Generally involves a motile haploid sperm fertilizing a larger non-motile haploid egg to make a diploid zygote.