The left and right y-axes are in opposite directions because Multiple Choice the protein products of the A and a genes counteract each other. a high proportion of one allele of a gene indicates a low proportion of the other. mutation tends to convert one allele to another. any given individual can have one of the alleles, but not both.

i need

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.