Multiple choice

Which of the following statements is/are correct?

a. Oxygen constitutes up to 95-97% of the atmosphere on Venus and Mars. b. Green plants fix carbon dioxide. c. Many marine animals use carbonates dissolved in seawater to breathe.

  1. a only

  2. b only

  3. c only

  4. a and b

  5. b and c
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This statement is correct. Green plants convert carbondioxide into glucose in the presence of sunlight. The process is called photosynthesis and carbon dioxide is fixed by plants through this. Thus, this is the correct answer.

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