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About how many years ago did photosynthesis begin in the ocean?

A2000-3000 Million year

B2500 -3000 Million year

C2000-3500 Million year

D2500-3500 Million year

Answer:

B. 2500 -3000 Million year

Read Explanation:

  • Photosynthesis began in the ocean about 2500-3000 million years ago

  • Photosynthesis is the process by which plants take in carbon dioxide and release oxygen

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How many plates does the lithosphere have?
മാന്റിലിലെ പ്രധാന മൂലകങ്ങൾ ഏവ :
ശിലാമണ്ഡലത്തിന് തൊട്ടുതാഴെയായി അർധദ്രാവക അവസ്ഥയിൽ കാണപ്പെടുന്ന അസ്തനോസ്റ്റിയർ മാൻിലിന്റെ ഭാഗമാണ്. അസ്തനോ എന്ന വാക്കിനർഥം :
Who among the following was the first to explain that the rotation of the earth on its own axis accounts for the daily rising and setting of the sun?

Which of the following statements are true about the Earth’s crust?

  1. Its thickness is uniform throughout.

  2. It is thickest under mountain ranges.

  3. The average density of oceanic crust is greater than continental crust.