Biology-Ch.24 Response

Biology-Ch.24 Response - Ch. 24 Response Ch. 24: Explain...

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Ch. 24 Response Ch. 24: Explain how each of the following makes it difficult to clearly define a species: variation within a species, geographically isolated populations, asexual species, fossil organisms. Variation within a species: Some species look very similar even though they are considered different species. The most defining factor in differentiating one species from another is the capacity to interbreed so although some species look very similar, they may have other forms of reproductive isolation impeding reproduction. In contrast, members within a species can look very different from one another yet still be considered the same species because they have the capacity to interbreed. The variation within a species makes it difficult to define because one would have to look at more aspects of an organism besides its morphological features especially when breeding is impossible. (morphological species concept) Geographically isolated populations: Similar to the variation within a species concept,
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This note was uploaded on 04/07/2008 for the course BIOL 152 taught by Professor Schnurr/vawter during the Spring '08 term at Wells.

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Biology-Ch.24 Response - Ch. 24 Response Ch. 24: Explain...

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