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natural selection
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∙ 9y ago
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What hypothesis proposes that evolution occurs slowly but steadily?
This is the concept of gradualism.
Occurs when species that were similar become increasingly distinct?
Divergent evolution:)
What occurs when species that were similar become increasingly extinct?
Divergent Evolution :)
Evolution that occurs at a constant rate is the hypothesis called?
Concept called gradualism. Not hypothesis, as it has been tested and confirmed, especially among the " little shellies. "
What is the name of the hypothesis that evolution occurs at an irregular rate through geologic time?
That theory is called punctuated equilibrium.
What is the hypothesis that evolution occurs with periods of drastic change folled by periods of very little change?
punctuated equilibrium
What is the gradual development of new organisms from preexisting organisms called?
I believe you are referring to evolution, which occurs as a result of natural selection causing species to change into new species over time.
What is the name of the hypothesis that suggests that evolution occurs at a slow constant rate?
Others have said twice: it is called Punctuated Equilibrium.
What did Lamarck have to do with evolution?
Lamarck believed that there was a form of evolution, but contrary to Darwin after him, he believed that the characteristics an organism acquires during his life are inherited by its descendants. For more on Lamarck's hypothesis, see the related question below.
What is it called when two very different species evolve to look like each other?
Convergent evolution may be the words you seek. This often happens when different species have to adapt to a similar environment. An example would be the similar body shape, and the shape of appendages; of both fish and of marine mammals.
When does convergent evolution occur?
Divergent evolution occurs when a single species develops a certain trait and then diverges to become two different species. Compare this to convergent evolution, where two different species develop a similar trait.
Why are fossils of intermediate life forms likely to be rare if the pattern of punctuated equilibrium explains how evolution occurs?
Intermediate species forms, yes. A the taxa level, no. Still, not all taxa evidence is supportive of punctuation and stasis. Punctuated equilibrium is only one explanation of how evolution occurs in some species, not all species. The little shellies evidence gradualist processes very well.
