Answer:
C. 22
Explanation:
I just studied this last week
Answer:
Which of the following are involved in the cycling of nutrients in nature?
I.Bacteria
II.Plants
III.Earthworms
IV.Humans
Bacteria, Plants and Earthworms
Explanation:
Bacteria, Plants and Earthworms plays vital role im nutrients recycling in nature, earthworm does this during soil burrowing which enables the soil to mix together easily and allow nutrients to circulate. Plants also helps through the practice of mixed cropping and shifting cultivation whereby different plant is planted every year as the case maybe.
Answer: cardiovascular system.
Explanation:
The circulatory system, also referred to as the cardiovascular system or vascular system, is an organ system that enables nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the body's cells to circulate and carry food.
Cyclins are a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes.
So A. Is correct