In pea, endosperm is consumed by developing embryo in the seed. The endosperm is completely absorbed by the growing embroyo and the food reserve gets stored in the cotyledons. Such seeds are called non endospermic or exalbuminous. OPTION (A) IS CORRECT.

The correct answer is option A: Pea.

Explanation:
In plants, the endosperm is a nutritive tissue that provides nourishment to the developing embryo. It is rich in starch, proteins, and other nutrients. In most plants, the endosperm is not completely used up by the developing embryo and remains as a storage tissue in the mature seed.

However, in some plants, the endosperm is completely used up by the developing embryo, and there is no residual endosperm in the mature seed. This phenomenon is known as "endospermic absorption." The pea plant is an example of a plant where the endosperm is completely used up by the embryo.

Here is a detailed explanation of the development of the endosperm in pea plants:

1. Double Fertilization: During double fertilization in pea plants, one sperm nucleus fuses with the egg cell to form the zygote, which develops into the embryo. The other sperm nucleus fuses with the two polar nuclei in the central cell to form the triploid endosperm nucleus.

2. Formation of Endosperm: The endosperm nucleus undergoes several rounds of mitotic divisions to form a triploid endosperm tissue. This endosperm tissue surrounds the embryo and provides nutrients for its development.

3. Absorption of Endosperm: As the embryo develops, it absorbs and utilizes the nutrients stored in the endosperm tissue. The endosperm is gradually used up, and by the time the seed matures, there is no residual endosperm left.

4. Mature Seed: In pea plants, the mature seed consists of the fully developed embryo surrounded by a seed coat. There is no endosperm present in the mature seed since it has been completely absorbed by the developing embryo.

In contrast to pea plants, other plants like castor, coconut, and mango have endosperm that remains in the mature seed, even after the embryo has fully developed. These plants are examples of plants with persistent endosperm, where the endosperm continues to function as a storage tissue in the mature seed.

In most of the dicot endosperm is completely consumed while in monocot endosperm is not consumed mostly..... A few exceptions are also present....