Which of the following statement(s) is/are correct?
I. The style is the elongated slender part beneath the stigma.
II. The ovarian cavity, also known as the ovarian locule, is situated within the ovary.
III. The placenta is positioned inside the ovarian cavity.
IV. The funicle serves as the attachment point between the ovule and the placenta.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → I, II, III and IV
I. The style is the elongated slender part beneath the stigma. — True. The pistil has three parts: stigma, style and ovary. The style is the long, slender part that joins the stigma at the top to the ovary at the base.
II. The ovarian cavity, also known as the ovarian locule, is situated within the ovary. — True. The ovary is the swollen base of the pistil. The space inside it is the ovarian cavity, or locule.
III. The placenta is positioned inside the ovarian cavity. — True. The placenta lies inside the ovarian cavity, and the ovules arise from it.
IV. The funicle serves as the attachment point between the ovule and the placenta. — True. The funicle is the stalk that attaches the ovule to the placenta. The point where the body of the ovule joins the funicle is the hilum.
NCERT Extract:
The Pistil, Megasporangium (Ovule) and Embryo Sac – “… The stigma serves as a landing platform for pollen grains. The style is the elongated slender part beneath the stigma. The basal bulged part of the pistil is the ovary. Inside the ovary is the ovarian cavity (locule). The placenta is located inside the ovarian cavity.”
The Pistil, Megasporangium (Ovule) and Embryo Sac – “… The ovule is a small structure attached to the placenta by means of a stalk called funicle. The body of the ovule fuses with funicle in the region called hilum. Thus, hilum represents the junction between ovule and funicle.”