Reproduction, Asexual and Sexual - Research Article from Macmillan Science Library: Animal Sciences

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Asexual Reproduction

Asexual reproduction takes a variety of forms. The simplest one-celled organisms may reproduce by binary fission, in which the cells simply divide in half. This form of reproduction creates a clone of the parent, and has the benefit of usually being very quick and energy efficient. For example, bacteria that reproduce by binary fission can give rise to progeny every few hours.

Some organisms, such as Cryptosporidium parvum, a sporozoan that causes traveler's diarrhea, may utilize multiple fission, in which they split into more than one offspring simultaneously. In multicellular organisms, a similar tactic is called fragmentation. In this process, small pieces break off and grow into new organisms. Still other organisms reproduce by budding, in which a smaller copy of the parent grows on the body and eventually splits off to begin life on its own.

All these variations of asexual reproduction have...

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This section contains 1,216 words
(approx. 5 pages at 300 words per page)
Buy the Reproduction, Asexual and Sexual Encyclopedia Article
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Macmillan Science Library: Animal Sciences
Reproduction, Asexual and Sexual from Macmillan Science Library: Animal Sciences. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
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