The correct option is A-2, B-4, C-1, D-3
Explanation
In angiosperms (flowering plants), the flower serves as the reproductive unit. It typically consists of four whorls, including the essential reproductive organs: the androecium (male reproductive part) and the gynoecium (female reproductive part).
Detailed Analysis:
- A. Anther (Matches 2): The anther is the terminal, usually bilobed structure of the stamen. It is responsible for producing and storing pollen grains, which contain the male gametes necessary for sexual reproduction.
- B. Filament (Matches 4): The filament is the long, slender stalk of the stamen. Its primary function is to support the anther, elevating it to a position that facilitates the effective release and dispersal of pollen.
- C. Ovary (Matches 1): The ovary is the swollen basal part of the pistil (carpel). It encloses the ovarian cavity, which contains the ovules (megasporangia). Upon fertilization, the ovules develop into seeds, and the ovary matures into a fruit.
- D. Stigma (Matches 3): The stigma is the sticky, terminal tip of the pistil. It acts as the receptive landing platform for pollen grains during the process of pollination.
Key Takeaway:
The male reproductive unit (stamen) consists of the anther and filament, while the female reproductive unit (pistil) comprises the stigma, style, and ovary.