I would say A is the correct answer. B and C are definitely wrong, and I think D is talking about genes and not chromosomes.
The troposphere is hotter near the Earth's surface because heat from the Earth warms this air. As the altitude increases the number of air molecules decreases, the average of their kinetic energy decreases.
Does this help?
if it does please mark me brainliest! thanks:)
Answer:
the four types of chemical weathering are:
oxidation
hydrolysis
hydration
carbonation
Rough ER - protein synthesis, transport of proteins throughout the cell
Smooth ER - lipid synthesis and cell detoxification
