Answer:
d
Explanation:
Mitochondria is the power house of the cell. It's where aerobic respiration happens and release of energy as ATP happens.
<u>Answer:</u>
C is the answer.
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<u>Explanation:</u>
Organelles (the smallest in this situation) are what you can find inside a cell (example: nucleus, mitochondria, etc..).
Cells are what make up tissues (such as muscles).
Tissues make up organs (such as the heart) and organs make up organ systems (such as the circulatory system).
Some examples of important nonliving things in an ecosystem are sunlight, temperature, water, air, wind, rocks, and soil. Living things grow, change, produce waste, reproduce, and die.