She has to place one plant in sunlight and one in shade to accurately tell the difference.
Answer: "gate-control theory (of pain)" .
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Answer:
A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. For example, the gene for eye color has several variations (alleles) such as an allele for blue eye color or an allele for brown eyes.
Explanation:
Colder temperatures that last for a short period of time such as 3-4 days.
