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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.
Reason: Sporopollenins are absent in the region of germ pores.
Reason: Sporopollenins are absent in the region of germ pores.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Directions: In the following questions a statement of assertion (A) is...
Wall of a pollen grain consists of two layers– outer exine and inner intine. Exine is the hard outer layer which is made up of sporopollenin. Sporopollenin is one of the most resistant organic material known. It can withstand high temperature, strong acids or alkali and is not degraded by enzymes. Because of the presence of sporopollenin, pollen grains are well preserved as fossils. At certain places, the exine is thin or absent, these areas may have thickened intine or deposition of callose. They are called germ pores (if rounded) or germinal furrows (if elongated). Sporopollenin is absent in the region of germ pores or germinal furrows.
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Directions: In the following questions a statement of assertion (A) is...
Explanation:
Assertion (A):
The exine of a pollen grain is composed of sporopollenin, a complex and resistant biopolymer that provides protection to the pollen grain. Sporopollenin is known for its resistance to high temperatures, strong acids or alkali, as well as enzymatic degradation.
Reason (R):
The reason provided states that sporopollenins are absent in the region of germ pores. This statement is true as sporopollenin is primarily found in the exine layer of the pollen grain and may not be present in the region of germ pores.
Explanation:
- The assertion is correct in stating that sporopollenins are resistant to various environmental conditions due to their chemical composition.
- The reason is also true as sporopollenins are mainly located in the exine layer of the pollen grain.
- However, the reason does not directly explain why sporopollenins are resistant to high temperatures, strong acids or alkali, as well as enzymatic degradation. It simply provides additional information about the distribution of sporopollenins within the pollen grain.
- Therefore, option (B) is the correct choice as both the assertion and reason are true, but the reason is not the correct explanation for the assertion.
Assertion (A):
The exine of a pollen grain is composed of sporopollenin, a complex and resistant biopolymer that provides protection to the pollen grain. Sporopollenin is known for its resistance to high temperatures, strong acids or alkali, as well as enzymatic degradation.
Reason (R):
The reason provided states that sporopollenins are absent in the region of germ pores. This statement is true as sporopollenin is primarily found in the exine layer of the pollen grain and may not be present in the region of germ pores.
Explanation:
- The assertion is correct in stating that sporopollenins are resistant to various environmental conditions due to their chemical composition.
- The reason is also true as sporopollenins are mainly located in the exine layer of the pollen grain.
- However, the reason does not directly explain why sporopollenins are resistant to high temperatures, strong acids or alkali, as well as enzymatic degradation. It simply provides additional information about the distribution of sporopollenins within the pollen grain.
- Therefore, option (B) is the correct choice as both the assertion and reason are true, but the reason is not the correct explanation for the assertion.
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct 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 Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct 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 Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?.
Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct 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 Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct 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 Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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Here you can find the meaning of Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion: Exine of a pollen grain is made up of sporopollenins which are resistant to high temperatures, strong acids or alkali as well as enzymatic degradation.Reason: Sporopollenins are absent in the region of germ pores.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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