Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus.
<span>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)</span>
Answer:
More acidic and carbon dioxide
Explanation:
Cause I took the test
The answer to this question is :B
