Answer:
Active transport: movement against a gradient To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the proper concentrations of ions and molecules in living cells.
Oxygen is the correct answer !
Answer:
Using the food chain which originates from the sun's energy.
Explanation:
The purpose of the government performance and results act is to improve the confidence of Americans in the ability of the federal government to carry out agency missions reliably