CK12 Life Science
Many of the modern types of organisms we know today evolved during the next ten million years in an event called the Cambrian ex ...
Figure 7.35: Humans have caused many extinctions by introducing species to new places. For example, many of New Zealand’s birds ...
environment. Scientists have been looking for evidence of why dinosaurs went extinct over fairly short periods. Many scientists ...
Figure 7.37: The supercontinent Pangaea encompassed all of today’s continents in a single land mass. This configuration limited ...
The dramatic extinction of all dinosaurs (except those which led to birds) marked the end of the Cretaceous period. A worldwide ...
Figure 7.39: Mammals and birds quickly invaded ecological niches formerly occupied by the dinosaurs. Mammals included monotremes ...
the oceans. Some of the first multicellular forms included sponges, brown algae, and slime molds. Plants and fungi appeared rou ...
Mayr, Ernst, What Evolution Is, Basic Books, 2001. Zimmer, Carl, Smithsonian Intimate Guide to Human Origins, Smithsonian Press ...
(4) NASA. http://commons.wikimedia.org/wiki/File:Earlobes_free_attached.jpg. Public Domain. (5) http://en.wikipedia.org/wiki/Ima ...
(22) http://en.wikipedia.org/wiki/Image:Blindmaus-drawing.jpg. Public Domain. (23) http://en.wikipedia.org/wiki/Dog. (24) http:/ ...
Chapter 8 Prokaryotes 8.1 Lesson 8.1: Bacteria Lesson Objectives Describe the cellular features of bacteria. Explain the ways i ...
at least a billion years, Bacteria and Archaea ruled the Earth as the only existing organisms. Even though life is much more div ...
Figure 8.2:Escherichia coliis an example of bacteria that are rod-shaped, or bacilli. ( 2 ) Figure 8.3:Staphylococcus aureusis a ...
Figure 8.4: The structure of a bacterial cell is distinctive from the eukaryotic cell because of features such as an outer cell ...
Obtaining Food and Energy Bacteria obtain energy and nutrients from a variety of different methods. Bacteria known as decomposer ...
can cause illness. In a bacterial parasitic relationship, the bacteria benefit and the other organism is harmed. Harmful bacteri ...
Figure 8.8: Bacteria can divide rapidly. This image is of a growing colony ofE. colibacteria. In the right environment the growt ...
nutrients, so they must come from other sources. We get them from the food we eat; plants get them from the soil. How do these n ...
Harmful Bacteria There are also ways that bacteria can be harmful to humans and other animals. Various speciesofbacteriaarerespo ...
Further Reading / Supplemental Links http://www.bt.cdc.gov/agent/anthrax http://www.cdc.gov/ncidod/dvbid/plague/index.htm http: ...
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