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The difference between perisperm and endosperm is that perisperm:
A. Has reserved food
B. Forms by fusion of the secondary nucleus with several sperms
C. Is a diploid tissue
D. Is a haploid tissue

Answer
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Hint:
Before we proceed with the problem, it is important to know about the perisperm and endosperm.
Some seeds, like beet and black pepper, still contain nucleus fragments. The portion of a seed that serves as a food source for the growing plant embryo and contains starch, protein, and other nutrients is called endosperm, while the remaining persistent nucleus is called perisperm. The endosperm is triploid, while the perisperm is made up of the leftovers of a diploid nucleus.

Complete step by step answer:
While the endosperm is a triploid tissue that results from triple fusion, the perisperm is a diploid tissue that emerges from the nucleus.
Higher plants' seeds contain two different types of food storage structures called perisperm and endosperm. The majority of seeds have nutritional reserves in the form of protein, fat, and carbs. During the germination of the seed, the embryo grows using the food that has been stored.
During the process known as seedling development, the endosperm is typically digested. The primary distinction between perisperm and endosperm is that the latter is a triploid food storage tissue that develops from triple fusion, while the former is a diploid food storage tissue that comes from the nucleus.

Option ‘C’ is correct

Note:
A nutritive tissue that stores food that emerges from the nucleus is called the perisperm. In addition, the perisperm of the seed is transformed into the embryo by the endosperm, which takes nutrients from it. After fertilization, a tissue called endosperm forms inside the seeds of flowering plants. In the seeds of flowering plants, the embryo is encased in the endosperm, a tissue that is edible.