Suppose a population of mostly sand-colored crabs migrates from a sand beach to a pebble beach and evolves a darker, speckled coloration that closely resembles the pebble beach. This is an example of
A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) sexual selection.
E) genetic drift.
A
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The figure below shows a three-dimensional model of the enzyme lysozyme and a map of the location of the important binding and catalytic amino acids that participate at the active site
Why are the amino acids of an enzyme that participate in substrate binding and in catalytic activity widely separated on the polypeptide chain, rather than being close together in the primary sequence? What will be an ideal response?
The proposition that species change through time was proposed by ____
a. Charles Darwin only b. Jean Baptiste de Lamarck only c. Alfred Russel Wallace only d. Charles Darwin and Jean Baptiste de Lamarck e. Charles Darwin, Jean Baptiste de Lamarck, and Alfred Russel Wallace
Which land biome has the greatest primary production?
1.Coniferous forest 2.Temperate grasslands 3.Temperate deciduous forests 4.Tropical forests
what proportion of the long-eared offspring will be homozygous for the long-eared allele?
A. 1/8 B. 1/4 C. 1/3 D. 1/2 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about monohybrid crosses? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?