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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Selaginella, Salvinia and Marsilea show heterospory.
Reason : They produce two kinds of sporesmicrospores and macrospores.
- a)Both A and R are true, and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Directions : In the following question, the Assertions (A) and Reason...
Heterospory is the production of two kinds of spores and is the first step towards seed habit. Pteridophytes such as Selaginella, Salvinia and Marsilea produce two kinds of spores- microspores and macrospores.
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Most Upvoted Answer
Directions : In the following question, the Assertions (A) and Reason...
Assertion: Selaginella, Salvinia, and Marsilea show heterospory.
Reason: They produce two kinds of spores - microspores and macrospores.
Explanation:
Heterospory is a reproductive strategy found in some plant species where two different types of spores, microspores, and macrospores are produced. These spores differ in size and function.
Assertion is true:
Selaginella, Salvinia, and Marsilea are examples of plants that exhibit heterospory. They produce two distinct types of spores - microspores and macrospores.
Reason is true:
The reason provided for the assertion is also correct. These plants produce microspores and macrospores.
Microspores:
Microspores are small-sized spores that give rise to male gametophytes. These gametophytes produce male gametes (sperm cells). In Selaginella, Salvinia, and Marsilea, microspores are produced in structures called microsporangia.
Macrospores:
Macrospores, on the other hand, are larger spores that give rise to female gametophytes. These gametophytes produce female gametes (egg cells). In Selaginella, Salvinia, and Marsilea, macrospores are produced in structures called megasporangia.
Significance of heterospory:
Heterospory is an important adaptation seen in some plant lineages. It allows for the production of different types of gametophytes specialized for male and female functions. This separation of male and female gametes increases the efficiency of sexual reproduction and helps in preventing self-fertilization.
Conclusion:
Both the assertion and the reason are true, and the reason correctly explains why Selaginella, Salvinia, and Marsilea exhibit heterospory.
Reason: They produce two kinds of spores - microspores and macrospores.
Explanation:
Heterospory is a reproductive strategy found in some plant species where two different types of spores, microspores, and macrospores are produced. These spores differ in size and function.
Assertion is true:
Selaginella, Salvinia, and Marsilea are examples of plants that exhibit heterospory. They produce two distinct types of spores - microspores and macrospores.
Reason is true:
The reason provided for the assertion is also correct. These plants produce microspores and macrospores.
Microspores:
Microspores are small-sized spores that give rise to male gametophytes. These gametophytes produce male gametes (sperm cells). In Selaginella, Salvinia, and Marsilea, microspores are produced in structures called microsporangia.
Macrospores:
Macrospores, on the other hand, are larger spores that give rise to female gametophytes. These gametophytes produce female gametes (egg cells). In Selaginella, Salvinia, and Marsilea, macrospores are produced in structures called megasporangia.
Significance of heterospory:
Heterospory is an important adaptation seen in some plant lineages. It allows for the production of different types of gametophytes specialized for male and female functions. This separation of male and female gametes increases the efficiency of sexual reproduction and helps in preventing self-fertilization.
Conclusion:
Both the assertion and the reason are true, and the reason correctly explains why Selaginella, Salvinia, and Marsilea exhibit heterospory.
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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?
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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. 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 question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. 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 question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?.
Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. 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 question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. 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 question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?.
Solutions for Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Selaginella, Salvinia and Marsilea show heterospory.Reason : They produce two kinds of sporesmicrospores and macrospores.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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