In essence, DNA is a thin and very, very long organic molecule. It is a polymer, and each of the monomers that constitute it are called

a. carbohydrates
b. ribosomes
c. nucelotides

well we can't tell you because we cant see the time give a screen shot or something.

compost can be added to topsoil as a:

pesticide

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.