3. Plants have properties that make them practical source of foods. Which property make them good source of foods?
A, resistance
B, mechanical C. chemical
D. physical

C

Explanation:

The property of plants that makes them a good source of food is the chemical property.

Plant lock-up energy in them in the form of carbohydrate which is derived from the process of photosynthesis. The energy from the sun is converted into chemical energy and when plant-consuming organisms feed on them, the chemical is broken down and the energy is released for the metabolic activities of the body.

These two processes can be expressed as equations:

1.

2.

The correct option here is C.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

is in the form atp or adenosine triphosphate