Seed Germination And Growth - The Plant Biology Test

In the given picture, number 3 refers to the endosperm. The endosperm is a tissue that surrounds and provides nourishment to the developing embryo within a seed. It is rich in nutrients such as starch, proteins, and oils, which are essential for the growth and development of the embryo. The endosperm is typically found in angiosperm seeds and plays a vital role in seed germination and early plant development.

In the given picture, the number 2 refers to the embryo. The embryo is the fertilized part of the seed from which a new plant develops. It contains the early stages of the plant's growth, including the shoot, root, and cotyledons. The embryo is an essential part of the seed and plays a crucial role in germination and the development of a new plant.

Plants need sunlight for photosynthesis, warmth to support their metabolic processes, good soil to provide essential nutrients and support their roots, and water for hydration and transportation of nutrients. Therefore, all of the above options are necessary for the growth of plants.

In the given picture, the number 1 refers to the Seed Coat. The seed coat is the outer protective covering of a seed. It provides protection to the embryo and the endosperm inside the seed. The seed coat helps in preventing the entry of pathogens and also helps in retaining moisture within the seed.