4 fertilization can occur only after pollination
<span>DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.</span>
Answer:
B
Explanation:
I looked it up as well as thought
Fish,hawk,sparrow and heron
It would decrease, because the producers are the source of food for the herbivores