Animal Diversity by Cleveland P. Hickman Jr., Larry S. Roberts, Allan Larson PDF

By Cleveland P. Hickman Jr., Larry S. Roberts, Allan Larson

ISBN-10: 0072349034

ISBN-13: 9780072349030

The 3rd variation of Animal range provides a survey of the animal country with emphasis on range, evolutionary relationships, sensible variations, and environmental interactions. it really is adapted for a one-semester or one-quarter path and is acceptable for either non-science and technology majors.

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A rare allele, according to this principle, does not disappear from a large population merely because it is rare. That is why certain rare traits, such as albinism and cystic fibrosis, persist for endless generations. For example, albinism in humans is caused by a rare recessive allele a. Only one person in 20,000 is an albino, and this individual must be homozygous (a/a) for the recessive allele. What is their frequency? A convenient Hickman−Roberts−Larson: Animal Diversity, Third Edition 1. 26 Frequencies of the blood-type B allele among humans in Europe.

Most colonies also have distinct periods of gamete formation and sexual reproduction. Colonies propagate also by fragmentation, as seen on coral reefs during severe storms. Pieces of coral may be scattered by wave action on a reef, becoming seeds for formation of a new reef. For these modular animals, age structure and sex ratio are difficult to determine. Changes in colony size can be used to measure growth rate, but counting individuals is more difficult and less meaningful than in unitary animals, which are independently living organisms.

On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London, John Murray. There were five subsequent editions by the author. , and J. Moore. 1991. Darwin. Warner Books, New York. An interpretive biography of Charles Darwin. , and J. C. Herron. 2001. Evolutionary analysis, ed. 2. Upper Saddle River, New Jersey, Prentice-Hall. An introductory textbook on evolutionary biology designed for undergraduate biology majors. Futuyma, D. J.

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Animal Diversity by Cleveland P. Hickman Jr., Larry S. Roberts, Allan Larson


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