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Nine-tenth of al photosynthesis of world...

Nine-tenth of al photosynthesis of world (85-90%) is carried out by

A

Large trees with millions of branches and leaves

B

algae of the ocean chlorophyll containing ferns of the forest

C

chlorophyll containing ferns of the forest

D

scientists in the laboratories

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the major contributors to photosynthesis on Earth, specifically identifying which organisms carry out 85-90% of the total photosynthesis. 2. **Identifying Key Organisms**: It is known that photosynthesis is primarily conducted by plants, algae, and phytoplankton. Among these, phytoplankton and algae in the oceans are particularly abundant. 3. **Analyzing Contribution**: Research indicates that phytoplankton, which are microscopic organisms found in oceans, contribute significantly to global photosynthesis. They are responsible for approximately 85-90% of the total photosynthesis on Earth. 4. **Considering Other Contributors**: While land plants, including trees and rainforests, do contribute to photosynthesis, their contribution is relatively smaller, estimated at around 10% of the total. 5. **Conclusion**: Based on the evidence, it can be concluded that the majority of photosynthesis (85-90%) is carried out by algae and phytoplankton in the oceans. **Final Answer**: Approximately 85-90% of photosynthesis is carried out by algae and phytoplankton in the oceans. ---

**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the major contributors to photosynthesis on Earth, specifically identifying which organisms carry out 85-90% of the total photosynthesis. 2. **Identifying Key Organisms**: It is known that photosynthesis is primarily conducted by plants, algae, and phytoplankton. Among these, phytoplankton and algae in the oceans are particularly abundant. 3. **Analyzing Contribution**: Research indicates that phytoplankton, which are microscopic organisms found in oceans, contribute significantly to global photosynthesis. They are responsible for approximately 85-90% of the total photosynthesis on Earth. ...
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