Cva refers to the damage of some cells, which occurs due to the loss of supply of oxygen to the brain. it is commonly known as a stroke. it is usually caused due to thrombosis, where there is formation of blood clot due to the disposition of calcium and cholesterol in the artery of the brain. what role diagnostic tests play in evaluating n. t for a suspected cva?

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.

a population evolve

genetic variations are caused by mutations which are random in the population