MCQOPTIONS
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| 1. |
Algae float in the water during day time and sink during night time because |
| A. | They become buoyant due to consumption of food materials in respiration |
| B. | They lose weight at night |
| C. | They come up to enjoy sunshine |
| D. | They become buoyant in light due to accumulation of oxygen bubbles released in photosynthesis |
| Answer» E. | |