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- Although we do not know how early life arose, the following likely happened:a. All organic molecules were transported to Earth by meteors.b. High levels of oxygen were essential for glycolysis.c. Lipids organized to form cell membranes.d. Organic molecules formed once temperatures reached moderate levels, equivalent to those in today's environment.
- Suppose that we have a scrub desert with light colored sand, and numerous patches of dark-colored rocks. Mice with two copies of a dark fur color allele are dark-colored and blend well with dark-colored rocks. Mice with two copies of a light color allele are light-colored and blend well with the sand. Mice with one copy of each (heterozygotes) are a brown color that does not blend well with either the sand or the dark-colored rocks. As a result, the brown mice are more susceptible to predators. Which type of selection is most likely to operate in this situation?
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