They help convert nitrogen to nitrate which is usable by living beings. (Living beings can't use regular nitrogen)
Answer:
the relationship between genes, proteins, and traits a gene codes for a particular protein that is involved in the expression of a trait
Explanation:
characteristics determined by single genes are called Mendelian traits
Answer:
"Manganese is a grey-white, hard and very brittle metal.
It tarnished on exposure to air and oxidized to manganese when heated."
Credits to: Yahoo
Yes Limestone is a sedimentary rock. :)