Answer: The correct answer for the blank is- Anther, stigma.
Fertilization ( process of fusion of male and female gamete) in flowering plants takes place when pollen ( containing male reproductive cell that is sperm) produced from anther ( male reproductive part) is transferred to the stigma ( a part of female reproductive system).
It then moves through a pollen tube ( style) that follows stigma and enters the ovule ( bearing eggs) of the ovary. Finally, fusion of male and female gamete takes place.
Parallel
B. Crisscross
C. Reticulated
The three parts are amino group, carboxyl group, and R group,
Amino acids are the basis of the constitution of proteins and other peptides, even if they are not the only constituents (see, for example, heme, prosthetic group of hemoglobin). This article aims to review the main characteristics common to all amino acids, as well as the particular properties of the main amino acids found in living molecules.
The molecule has two ionizable groups: one acid (COOH <-> COO - + H +), the other basic (NH 2 + H + <-> NH3 +). The carbon atom to which the amine-NH 2 group is attached and the carboxylic acid-COOH group is called alpha carbon convention.
The group R corresponds to a variable radical depending on the amino acid in question. It is therefore he who determines the nature of the amino acid since the rest is invariant.
b. parasitism because the insect lives off the nectar from the flower.
c. commensalism because the insect does not harm the flower and the flower does not benefit from the relationship.
d. predation because the insect feeds on the flower.