📊 Biology
Q. Algae often float on surface of water during the day but sink down during the night due to
  • (A) Evolution and trapping of oxygen bubbles during the day in their photosynthesis
  • (B) Becoming light as they consume most of their food in the night
  • (C) Release of absorbed air by warming of water
  • (D) Warming action of sun during the day
✅ Correct Answer: (A) Evolution and trapping of oxygen bubbles during the day in their photosynthesis

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Ram Sharma
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