Biomagnification is the term used to show the increasing concentrations of a substance as one moves up the food chain.
Answer:
b
Explanation:
b is the nucleus and it contains the dna
Each nucleotide, in turn, is made up of a nitrogenous base, a pentose sugar, and a phosphate.
The total net force acting on the rope is 120 because 300 - 180 = 120.
