As powerful as diffusion is, cells sometimes must move materials in the opposite direction—against a concentration difference. This is accomplished by a process known as active transport. As its name implies, active transport requires energy.
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Answer:
22:- in mitosis stem cells and somatic cells cell division occurs and in meoisis germ cells cell division occurs
23:- at end of mitosis 2 daughter cells formed and meiosis 4 daughter cells formed
24:- in mitosis cells are same and in meiosis cells are different
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Answer:
permeability
Explanation:
dictionary definition: the state/quality of a material or membrane that causes it to allow liquids or gases to pass through it
in biology we use this term to describe the cell membrane, it is "semi-permeable" because it allows certain gasses and molecules to pass through
Secretion helps in moistening the food, making it easier to swallow and preventing oral infections.
