Answer:
Explanation:
Secondary energy resources are those which do not occur naturally but which are obtained from one or more of the primary energy resources. Example: Petrol or gasoline, electrical energy from coal burning, hydrogen obtained by electrolysis of water etc. Non-commercial source of energy: Firewood, cow dung , and vegetable wastes.
Answer: C
Explanation: Cells reproduce and divide through a process called mitosis
Anaerobic respiration is when organisms don't use oxygen to breathe. That occurs in organisms such as yeasts. Usually, the higher the temperature the more anaerobic respiration occurs.
Answer: Permeable
Explanation: In the picture you can see that only the red ones can pass through.
