AP BIOLOGY CH 26
Subject:
Biology [1]
Tags:
Biology [2]
microbiology [5]
Paleontology [7]
Eukaryote [9]
organism [10]
Prokaryote [11]
Archaea [12]
bacteria [13]
Chapter 26 The Tree of Life An Introduction to Biological Diversity Overview: Changing Life on a Changing Earth Life is a continuum Extending from the earliest organisms to the great variety of species that exist today Geological events that alter environments Change the course of biological evolution Conversely, life changes the planet that it inhabits Figure 26.1 Geologic history and biological history have been episodic Marked by what were in essence revolutions that opened many new ways of life Concept 26.1: Conditions on early Earth made the origin of life possible Most biologists now think that it is at least a credible hypothesis That chemical and physical processes on early Earth produced very simple cells through a sequence of stages