Active transport is selective and is dependent upon:
Correct answer: B. Respiration
- A. Photosynthesis
- B. Respiration
- C. Transportation
- D. Penneability
Explanation
Active transport is a process that requires energy, often derived from cellular respiration, to move molecules or ions against their concentration gradient across a cell membrane. It is a selective process that enables cells to control the movement of specific substances.
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The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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