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Chapter 14
Mandatory Terms
Term | Definition |
---|---|
Spontaneous Generation | An early and now disproved theory that living organisms come to life spontaneously from nonliving material |
Biogenesis | The scientific principle that living organisms come only from other living organisms |
Half-life | The time required for half of a sample of a radioactive isotope to break down by radioactive decay to form a daughter isotope |
Endosymbiosis | A mutually beneficial relationship in which one organism lives within another; a theory that eukaryotic cells originated through endosymbiotic relationships between ancient prokaryotic cells |
Microsphere | A microscopic spherical structure composed of many protein |
Coacervate | A mass of droplets of colloidal substances, such as lipids, amino acids, and sugars, that are held together by electrostatic attraction |
Radioactive Decay | The disintergration of an unstable atomic nuclues into one or more different nuclides, accompanied by the emission of radiation, the nuclear capture or ejection of electrons, or fission |