Practicing Success
Practicing Success
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Assertion (A): The perisperm is derived from the zygote. Reason (R): The zygote develops into the embryo, not the perisperm. |
Both A and R are true, and R is the correct explanation of A. Both A and R are true, but R is not the correct explanation of A. A is true, but R is false. A is false, but R is true. |
A is false, but R is true. |
The correct answer is Option (4) - A is false, but R is true. Perisperm refers to the remnant of the nucellus, which is the tissue present within the ovule of a flowering plant. It is the part of the seed that surrounds and is distinct from the embryo and endosperm. In the life cycle of a flowering plant, after fertilization occurs, the zygote develops into an embryo, and the central cell of the embryo sac develops into the endosperm. The endosperm is a triploid tissue that provides nourishment to the developing embryo. In some plant species, the nucellus surrounding the embryo sac also undergoes changes after fertilization. The nucellus degenerates or breaks down, and its remnants become the perisperm. The perisperm is a part of the seed that persists and surrounds the embryo and endosperm. |
