Which of the following statement(s) is/are correct?

I. The stigma functions as a landing platform for pollen grains.

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.

I, II, III, and IV

I. The stigma functions as a landing platform for pollen grains.

The stigma is a receptive surface found at the top of the pistil, which is the female reproductive part of a flower. Its main function is to receive pollen grains during the process of pollination. The stigma is often sticky or has specialized structures that allow it to capture and hold onto pollen grains. When a pollen grain lands on the stigma, it may adhere to the surface and begin the process of germination, forming a pollen tube that grows down through the style towards the ovary.

II. The ovarian cavity, also known as the ovarian locule, is situated within the ovary.

The ovary is the enlarged basal portion of the pistil, and it contains one or more compartments called ovarian cavities or ovarian locules. These cavities are enclosed within the ovary and house the ovules, which are the structures that develop into seeds after fertilization. The number of ovarian cavities can vary depending on the species of the plant.

III. The placenta is positioned inside the ovarian cavity.

The placenta is a structure within the ovary that plays a crucial role in seed development. It is responsible for providing nourishment and support to the developing seeds. The placenta is located inside the ovarian cavity, and it is where the ovules are attached. It is an essential component for the successful maturation of seeds within the ovary.

IV. The funicle serves as the attachment point between the ovule and the placenta.

The funicle is a stalk-like structure that connects the ovule to the placenta within the ovary. It acts as a conduit for nutrients and water, allowing for the transfer of these essential substances from the placenta to the developing ovule. Furthermore, the funicle provides physical support to the ovule, keeping it in place within the ovary.