Answer:( answer for number one) an essential nutrient for the production of amino acids, proteins, nucleic acids. ( number 2 ) for the growth, maintenance, and repair of all tissues and cells, and for the production of the genetic building blocks, DNA and RNA
Answer: Reproduction. One must reproduce in order to continue the generational line.
A keystone species helps define an entire ecosystem. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether.
Answer: the answer is D.
Explanation:I got it right on edge
