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Assertion (A): Algae contribute to nearly 50% of the total photosynthesis on Earth.
Reason (R): Algae have a wide range of photosynthetic pigments that allow them to efficiently capture light energy.
  • 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 'B'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): Algae contribute to nearly 50% of the total photosynthe...
Assertion (A): Algae and Photosynthesis
Algae play a crucial role in the Earth's ecosystem, particularly in the process of photosynthesis. It is estimated that algae contribute nearly 50% of the total photosynthesis on the planet.

Reason (R): Efficiency of Light Energy Capture
Algae possess a diverse array of photosynthetic pigments, such as chlorophyll a, chlorophyll b, and carotenoids. This diversity allows them to efficiently capture light energy across different wavelengths, enhancing their ability to perform photosynthesis effectively.

Explanation of the Relationship Between A and R
- Both the assertion and reason are true.
- The reason elucidates why algae can contribute significantly to photosynthesis. The variety of pigments in algae enables them to absorb light energy effectively, which supports the high rates of photosynthesis attributed to them.

Conclusion
Therefore, the correct choice is option **B**: "Both A and R are true, but R is not the correct explanation of A." This means while both statements are accurate, the reason provided does not specifically explain the assertion about the percentage of photosynthesis attributed to algae. Instead, it highlights a mechanism that allows algae to thrive in photosynthetic processes.
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Community Answer
Assertion (A): Algae contribute to nearly 50% of the total photosynthe...
It's true that algae contribute significantly to global photosynthesis, thanks in part to their abundance in aquatic environments, where they play a key role in carbon fixation. While algae do possess a diverse array of photosynthetic pigments allowing them to efficiently capture light energy, the primary reason for their substantial contribution to Earth's photosynthesis is their vast numbers and widespread distribution, especially in the oceans. Therefore, while both statements are true, the reason given is not the direct explanation for the assertion.
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Assertion (A): Algae contribute to nearly 50% of the total photosynthesis on Earth.Reason (R): Algae have a wide range of photosynthetic pigments that allow them to efficiently capture light energy.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 'B'. Can you explain this answer?
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