C
Brown algae
Im pretty sure this is correct
<span>Alleles are each of two or more alternative forms of a gene that are found at the same position in a chromosome. Traits on the other hand, are the characteristics that are defined by genes. So the combination of alleles for a gene is what manifests itself into a trait.</span>
The correct answer is C. Artiodactyls
They've been around more than the others and have existed for some 55 million years.
b)1 unicellular- means one cell
