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Assertion : In angiosperms, endosperm de...

Assertion : In angiosperms, endosperm development precedes embryo development.
Reason : Double fertilisation ensures that the nutritive tissue is formed before the zygotes starts cleaving so that the energy spent on the formation of endosperm does not get wasted.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution 1. **Understanding the Assertion**: - The assertion states that in angiosperms (flowering plants), the development of the endosperm occurs before the development of the embryo. This is a key feature of angiosperm reproduction. 2. **Understanding the Reason**: - The reason provided explains the process of double fertilization, which is unique to angiosperms. In this process, one male gamete fertilizes the egg cell to form a diploid zygote (this is the embryo), while the other male gamete fuses with two polar nuclei to form a triploid endosperm nucleus. 3. **Connecting Assertion and Reason**: - The reason given supports the assertion. Double fertilization ensures that the endosperm, which serves as a nutritive tissue for the developing embryo, is formed before the zygote begins to divide. This prevents the waste of energy in case the fertilization fails. 4. **Conclusion**: - Both the assertion and the reason are correct. The reason accurately explains why endosperm development precedes embryo development in angiosperms. 5. **Final Answer**: - Therefore, the correct option is that both the assertion and reason are correct, and the reason is the correct explanation for the assertion.
### Step-by-Step Solution 1. **Understanding the Assertion**: - The assertion states that in angiosperms (flowering plants), the development of the endosperm occurs before the development of the embryo. This is a key feature of angiosperm reproduction. 2. **Understanding the Reason**: - The reason provided explains the process of double fertilization, which is unique to angiosperms. In this process, one male gamete fertilizes the egg cell to form a diploid zygote (this is the embryo), while the other male gamete fuses with two polar nuclei to form a triploid endosperm nucleus. ...
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