18. How many access valves are needed to recover the refrigerant on a sealed system with an opera compressor that has a completely restricted capillary tube?

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.

what tree

explanation:

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.