Question

 Why is sexual reproduction advantageous for some organisms?
A It allows 100% of an organism's genes to be passed on.
B It allows fast reproduction in a stable environment.
C Different gene combinations lead to genetic variety.
D All of the organisms in a population can produce offspring.

Answer 1

Your answer should be C. unicellular organism since they don't use sexual reproduction to reproduce. but rather reproduce by themselves, or in other words asexual reproduction.  

Answer 2

C Different gene combinations lead to genetic variety.
sexual reproduction involves alleles of of different traits (genes) allowing for new combinations of alleles to be possible.