Double cross in genetics is when which each parent is the product of a single cross.
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Answer:
biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Explanation:
Biology is important because it can lead to the study of living organisms to help develop biological knowledge and understanding of living processes for a number of different purposes, including treatment of disease and sustaining the natural environment.
C. 5 1/2 because <span>A sleep cycle lasts about 90 minutes and during that time we move through five stages of sleep </span>