Correct answer - A.
Why? - A nucleotide consists of a sugar molecule (deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T).
The tendency of an organism or a cell to regulate its internal conditions, usually by a system of feedback controls, so as to stabilize health and functioning, regardless of the outside changing conditions.
Answer:
half
Explanation:
Pollen is composed of pollen grades which are microgametophytes of seed plants. This is one of two alternating phases in the life cycle of plants and algae. From these, the male gametes, also known as sperm cells will develop. As all gametes are haploid, the pollen grain will thus contain half of the genetic material found in a regular plant cell.
