BIOL 1521 Study Guide - Midterm Guide: Vascular Plant, Cambrian Explosion, Anoxygenic Photosynthesis
Document Summary
From aciviies associated with each of the following class topics, students should be able to: As this cooled, it straiies according to density and led to a layered composiion: more c12 than c13 for organic compounds, rock samples (limestones associated with the early life) with more c12 indicated there was photosyntheic life. Changes in the atmosphere challenged and facilitated new life forms. Iron formaion is a rock that is commonly banded, and the bands contain iron minerals (iron oxide). It cannot form in the oceans today because when you put iron in a soluion with oxygen, it immediately precipitates as an oxide. The evidence of the sedimentary rocks is that the iron was traveled through oceans without ever coming into contact with oxygen. This theory explains how chloroplasts and mitochondria are now a part of a eukaryoic cell. There are two disinct cells, one eukaryoic and the other is mitochondria/chloroplast independently as a bacteria.
