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Persistent nucellus in the seed is known as: (2019)
- a)Tegmen
- b)Chalaza
- c)Perisperm
- d)Hilum
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Persistent nucellus in the seed is known as: (2019)a)Tegmenb)Chalazac...
The correct answer is option 'C', Perisperm.
Explanation:
- A seed typically consists of three main parts - the embryo, endosperm, and seed coat.
- The embryo is the tiny plant inside the seed that will grow into a new plant.
- The endosperm is a source of nutrients for the developing embryo, and it is usually the largest part of the seed.
- The seed coat is the outer covering of the seed that protects the embryo and endosperm.
- In some seeds, there is an additional tissue called the perisperm.
- The perisperm is formed from the persistent nucellus, which is the tissue that surrounds and nourishes the embryo sac during development.
- In some seeds, the perisperm remains after the endosperm has been used up, and it continues to provide nutrients to the developing embryo.
- The perisperm is often found in seeds of monocotyledonous plants, such as corn, rice, and wheat.
Therefore, persistent nucellus in the seed is known as Perisperm.
Explanation:
- A seed typically consists of three main parts - the embryo, endosperm, and seed coat.
- The embryo is the tiny plant inside the seed that will grow into a new plant.
- The endosperm is a source of nutrients for the developing embryo, and it is usually the largest part of the seed.
- The seed coat is the outer covering of the seed that protects the embryo and endosperm.
- In some seeds, there is an additional tissue called the perisperm.
- The perisperm is formed from the persistent nucellus, which is the tissue that surrounds and nourishes the embryo sac during development.
- In some seeds, the perisperm remains after the endosperm has been used up, and it continues to provide nutrients to the developing embryo.
- The perisperm is often found in seeds of monocotyledonous plants, such as corn, rice, and wheat.
Therefore, persistent nucellus in the seed is known as Perisperm.
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Community Answer
Persistent nucellus in the seed is known as: (2019)a)Tegmenb)Chalazac...
Nucellus is the mass of parenchymatous cells enclosed within integuments of an ovule. It is the storehouse of abundant food reserves. The residual, persistent nucellus in the seed is called perisperm.
Chalaza is the basal part of the ovule, hilum is the junction between ovule and funicle and tegmen is the inner layer of the seed coat in a dicotyledonous seed.
Chalaza is the basal part of the ovule, hilum is the junction between ovule and funicle and tegmen is the inner layer of the seed coat in a dicotyledonous seed.
Hence, the correct option is C.
NCERT Reference: Page no. 36 of topic “2.4.3 Seed” of chapter 2.
NCERT Reference: Page no. 36 of topic “2.4.3 Seed” of chapter 2.
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