The correct sequence of events of sexual reproduction in a flower is c. pollination, fertilization, embryo, seedling.
Explanation:
Pollination:
Pollen grains are transferred from the anther (male part of the flower) to the stigma (female part of the flower).
Fertilization:
The pollen grain germinates on the stigma and a pollen tube grows down the style to the ovary, where the male gamete (pollen grain) fuses with the female gamete (egg).
Embryo:
The fertilized egg (zygote) divides and develops into an embryo.
Seedling:
The embryo, along with the surrounding protective structures (seed coat and endosperm), develops into a seedling when the seed germinates.
Why other options are incorrect:
a. pollination fertilization seedling embryo: The order is reversed. The embryo forms after fertilization, not before.
b. seedling embryo fertilization pollination: The sequence starts with the formation of a seedling, which is incorrect. Seedlings develop from embryos, which in turn form after fertilization.
d. embryo seedling pollination fertilization: The sequence starts with the embryo, which is incorrect. The embryo develops after fertilization. Pollination and fertilization precede the formation of an embryo.