Why are viruses considered to be nonliving? A) They cannot obtain energy from their host.
B) They have no genetic material.
C) They can reproduce only in a host.
D) They do not respond to their environments.

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

How does friction with the atmosphere affect the speed of an artificial satellite

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation