Climate change is most commonly measured using the average surface temperature of the planet.
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Answer:
mitochondrion becoz it is a membrane bounded organelle which is only present in eukaryotic cell
Answer:
Digestion, excretion and transportation of substances.
Explanation:
Chemical reactions such as breakdown of food, cleaning of blood and absorption of nutrients and digestion are the activities that our body done with the use of energy. Digestion of food needs energy for the breakdown of food with the help of several enzymes. Transportation of waste materials and other substances also needs energy. Our cells absorb nutrients with the help of energy molecules through active transport.
This is true, comets have long, indefinite life spans.
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