1. describe the structure and function of the cell wall of a plant cell. 2. The nucleus is a round, double - walled structure often found in the center of both plant and animal cells. What are the TWO primary function of the nucleus?
Please answer as quick as possible.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.