ARCH 131 Lecture Notes - Lecture 5: Oogenesis, Thymine, Guanine

• School: Simon Fraser University
• Department: Archaeology
• Course: ARCH 131
• Professor: Dennis Sandgathe

Document Summary

Lecture 5 very first life on earth were called prokaryotic cells: single celled organisms, first appeared around 3. 8 billion years ago, were only forms of life until eukaryotic cells appeared 1. 5 billion years ago did evolve into multi cellular life humans are multi cellular life; we don"t care much about prokaryotic life differences in prokaryotic and eukaryotic cells, in prokaryotic cells, genetic material just floats around in cell, not housed or protected in the nucleus, in eukaryotic cells, there is a nucleus that houses the genetic material, basic animal cell structure, plasma membrane membrane that encloses cell and protects it, acts as a messenger to a certain extent, communicates with other cells, filled with cytoplasm that helps provide structure and is a source of raw materials (amino acids for the most part, nucleus has own membrane that encloses it, and protects genetic material.