In the atmosphere, the density of air particles decreases with height, with more gas particles remaining near the surface of Earth. When only taking into account humidity, dry air is more dense than moist air because of molecular weights of the gases.
The answer is B. both need food and air
These would be any cells that reproduce asexually, like bacteria
The fact that each plant gets only one allele
from each parent plant is detailed in the law of segregation
