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Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.
Reason : Sporopollenin is absent in the region of germ pores.
  • 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
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Assertion : Exine of a pollen grain is made up of sporopollenin which ...
Assertion Analysis
The assertion states that the exine of a pollen grain is composed of sporopollenin, which is known for its exceptional durability. This characteristic enables it to withstand extreme conditions, including:
- High temperatures
- Strong acids and alkalis
- Enzymatic degradation
Sporopollenin's robust structure makes it one of the most resistant biological materials, serving a critical protective function for the pollen grain.
Reason Analysis
The reason provided claims that sporopollenin is absent in the germ pores of the pollen grain. Germ pores are specific areas on the pollen grain where the exine is thinner and allows for the emergence of the pollen tube during fertilization.
- Germ pores facilitate the process of fertilization.
- They are crucial for the pollen grain's ability to germinate.
Explanation of the Answer
Both the assertion and the reason are true:
- Assertion: The exine is indeed made of sporopollenin, which is resistant to harsh environmental conditions.
- Reason: Sporopollenin is absent at the germ pores, allowing for pollen tube emergence.
However, the reason does not serve as the correct explanation for the assertion. The resistance of sporopollenin is a general property and does not directly relate to its absence at germ pores; rather, it highlights a functional adaptation for pollen germination.
Therefore, the correct answer is:
Option B: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
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Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.Reason : Sporopollenin is absent in the region of germ pores.a)If both assertion and reason are true and reason is the correct explanation of assertionb)If both assertion and reason are true but reason is not the correct explanation of assertionc)If assertion is true but reason is falsed)If both assertion and reason are falseCorrect answer is option 'B'. Can you explain this answer?
Question Description
Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.Reason : Sporopollenin is absent in the region of germ pores.a)If both assertion and reason are true and reason is the correct explanation of assertionb)If both assertion and reason are true but reason is not the correct explanation of assertionc)If assertion is true but reason is falsed)If both assertion and reason are falseCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.Reason : Sporopollenin is absent in the region of germ pores.a)If both assertion and reason are true and reason is the correct explanation of assertionb)If both assertion and reason are true but reason is not the correct explanation of assertionc)If assertion is true but reason is falsed)If both assertion and reason are falseCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion : Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation.Reason : Sporopollenin is absent in the region of germ pores.a)If both assertion and reason are true and reason is the correct explanation of assertionb)If both assertion and reason are true but reason is not the correct explanation of assertionc)If assertion is true but reason is falsed)If both assertion and reason are falseCorrect answer is option 'B'. Can you explain this answer?.
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