Answer:
<em><u>B</u></em>
Explanation:
cell is the first organization level
tissue is the second level
organ is the third level
organ systam is the fourth level
organsim is the last organization level
Needs more info to answer question
Answer: The dependent variable.
Explanation: Experimental studies are designed to find relationships between one variable and another.
The answer would be, Heterozygous Genotype.
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