BIOL 1000 Chapter Notes - Chapter 3: Globus Pallidus, Disfigurement, Syphilis
30 Nov 2012
School
Department
Course
Professor
Document Summary
Biodiversity: measured as the number of species of organisms, biodiversity reflects the reality hat life on earth exists from the ocean floor to well into the atmosphere. The study of biology focuses on the levels of life (figure 3. 1 page 48) From molecules and organelles, cells, organisms, ecosystems, and the biosphere. Biosphere: all regions of earth"s crust, waters and atmosphere that sustain life. Answer depends on how we define type of organism: using a taxonomic definition (defined in chapter 18), we can consider the number of organisms in each kingdom. Numbers are easier to determine for some kinds of organisms than for others, but we can still determine an overview of life on earth by groups of organisms (figure 3. 3 page 50) Information about large, easily observed organisms such as mammals, birds, and flowering plants is quite accurate compared to information about the numbers of species of microscopic organisms that live in habitats where they are hard to observe.
