12.3 Origin of Life & 12.4 Early Single-Celled Organisms
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Created by:
donnacooper Plus on May 1, 2012
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Vocabulary
Chapter 12 The History of Life
Biology 2010
Holt McDougal
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10 terms
Terms | Definitions |
|---|---|
 nebula | rotating cloud of gas and dust |
| ribozyme | RNA molecule that can catalyze specific chemical reactions |
| cyanobacteria | bacteria that can carry out photosynthesis |
| endosymbiosis | ecological relationship in which one organism lives within the body of another |
| prokaryote | single-celled organism with a cell structure that does not have a nucleus or other membrane-bound organelles |
| anaerobic | process that does not require oxygen to occur |
| eukaryote | organism with cell structure that has a nucleus and other membrane-bound organelles |
| aerobic | process that requires oxygen to occur |
| asexual reproduction | process by which offspring are produced from a single parent; does not involve the joining of gametes |
| sexual reproduction | process by which two gametes fuse and offspring that are a genetic mixture of both parents are produced |
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