Answer:
haploid diploid half sex reduction
Explanation:
HIV directly attacks CD4 helper lymphocytes directly. (D)
The answer is B. Population
Organ- a group of tissues in a living organism
examples- heart, lungs, liver, kidney, and stomach
A. Consumers cannot produce their own food source so they have to eat other animals.
C. Rhizobia bacteria "prepare" the atmospheric nitrogen and make it useful for the plant.
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