A key component in the formation of organic compounds, such as nucleic acids and ATP
Most abundant gas in the atmosphere; plants absorb it from bacteria in the soil
In every living thing; plants utilize it when they perform photosynthesis

Nitrogen

Explanation:

Nitrogen is the most abundant gas in the atmosphere. Plants also absorb fixed nitrogen from bacteria in the soil.

1) phosporus

2)nitrogen

3)carbon

Explanation:

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~DuffyDuck~

b.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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