What happens during carbon fixation? a. Carbon dioxide is added to a five carbon sugar, making it a six carbon sugar.
b. Carbon dioxide is broken apart to release carbon and oxygen gas.
c. Sucrose is made by combining fructose and glucose.
d. ATP and NADPH are synthesized.

a. Carbon dioxide is added to a five carbon sugar, making it a six carbon sugar.

Explanation:

I think this is the answer, but I'm not sure. I learned this a long time ago in Biology.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a