Which adaptation is likely to increase the chances of survival of an organism in an arctic environment? White coat, as it protects from predators
Brown coat, as it protects from temperature
Thick coat, as it protects from predators
Thin coat, as it protects from temperature

and please explain for brainliest.

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.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.