Deoxigenated blood returns to the heart via the vena cava. where does the blood go from the vena cava a. left ventricle
b. left atrium
c. right ventricle
d. right atrium ​

Darius is observing a family of geese, which includes a male goose, female goose, and several goslings. when a dog approaches the geese, the male goose hisses at the dog and flaps its wings threateningly. is the behavior of the male goose an example of an adaptation?

What was darwins theory of common decent

In what part of the body does the most muscle activity happen?