Answer:
a. an organism that has two different alleles for a trait
b. possible genotypes for the offspring
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It’s right , u did it correct no need to worry I checked
2 is B. Water freezes and 4 is the rock breaks.
Your answer is the peripheral proteins. Its on the inner or outer surface of the phospholipid bilayer, but not embedded in its hydrophobic core.
I believe the answer is the location of energy sources