Which of the following is the single largest component of a typical soil?
air
moisture
minerals
organic material

Minerals

Explanation:

A soil is an agregate of minerals, water, organic matter, and air. Each component is necessary for making the soil fertile for plant growth. The largest component of the soil is the mineral content. As initially the soil is produced after the withering process of the parent rocks. These rocks contains the high mineral content.

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.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.