Answer:
milk is present in the digestive system, which turns on the gene for lactase.
Explanation:
Answer: Because selection is greater under strong competition (Martin et al. 1988), genetic variation only increased niche expansion in populations with high competition (figure 2), as reflected in the significant interaction term between genetic variation and competition (table 2).
Explanation:
Answer:
The correct answer is A. crop rotation.
Explanation:
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