66.
Which of the following plays an important part in photosynthesis?

67.
Which of the following plays an important role in photosynthesis?

68.
Which of the following gas is necessary for the process of photosynthesis?

69.
Photosynthesis fulfills which of the following requirements of the autotrophic organisms?
I. Carbon
II. Water
III. Energy

70.
The gas released during the photosynthesis by the green plants is