Answer:Humans obtain energy from three classes of fuel molecules: carbohydrates, lipids, and proteins.
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Explanation:
B. X.
C. N.
D. Y.
Answer:
Shape and size vary from cell to cell according to their functions and composition. For example, a nerve cell is long and branched, meant for the transmission of signals throughout our body while a muscle cell is small and spindle-shaped which helps in movement.
Explanation:
B. A part of earth’s surface covered by ocean water
C. A continuous body of water that covers 70%of earth
D. A deep trench along the floor of the ocean
Answer: A
Explanation:
An oceanic basin is the land surface under an ocean that includes the various topography below the water. This includes the continental shelf, abyssal plain, mid-ocean ridge and other formations that may exist on the seafloor.
Answer: it changes to thermal energy.
Explanation: