An organized way to collect and record scientific observations is to write it down in a notebook or make a chart.
Because the greenhouse gases, such as water vapor, carbon dioxide, methane and etc.,
move in and out of the atmosphere. They trap some of the heat radiated
out from the Earth that would normally move out into space. And without it<span> this planet would be really cold.</span>
Answer:
i'm not sure if these are all the options you have but the answer is that active transport requires energy and that active transport is the movement of molecules from an area of their lower to their higher concentration against the concentration gradient
Explanation:
2 because, the two sex cells sperm and egg cells