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D is not correctly describe a rock
Anything to do with partial or before
Answer: False
Explanation:
Active transport is the movement of molecules from a region of lower concentration to a region of higher concentration across the cell in a concentration gradient. It requires the use of energy .
Passive transport is the movement of molecules in and out of the cell from higher concentration to lower concentration without the use of energy.
Answer:
No.
Explanation:
No, hand-crank flashlight would not be a good energy system for the rescue workers because the light turns on by applying muscle force on the hand-crank flashlight and after that, the device convert muscle force into electric energy and the light turns on and we know that the rescue worker have a tough job which requires both hands so this hand-crank flashlight is not useful to him.
