Answer:
FERTILIZATION
Explanation:
Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition. Thus, sexually reproducing organisms alternate between haploid and diploid stages. However, the ways in which reproductive cells are produced and the timing between meiosis and fertilization vary greatly.
Answer:
Organ System
Explanation:
A group of organs working together so that they can perform a function more complex than any of the single organs is called an organ system.
I would believe that the Answer is C