Which of the following is not required in photosynthesis?
a. chlorophyll
b. Light
c. CO2
d. O2

Which of the following statements does not justify the importance of photosynthesis?
1. it is the primary source of all food on earth.
2. it is responsible for the release of oxygen into the atmosphere.
3. it is responsible for the water balance on earth.
4. use of energy from sunlight by plants doing photosynthesis is the basis of life on earth.

Photosynthesis is a-
a. Biochemical process
b. Physical process
c. Chemical process
d. Physico-chemical process

Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Which of the following statement is correct?

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

1. Violet and green light

2. Indigo and green light

3. Orange and yellow light

4. Blue and red light

Choose the incorrect statement regarding early experiments on photosynthesis

1. Priestley experiment revealed the essential role of air in the growth of a green plant

2. Ingenhousz showed that sunlight is essential to the plant processes

3. It is green parts of the plants that can release oxygen

4. Von Sachs provided evidence for production of carbon dioxide when plants grow

Sunlight is essential for photosynthesis is established
by
1. Jan Ingenhousz
2. Robert Hill
3. Emerson
4. Julius Von Sach

Which of the following shows the correct match?
1. i-c; ii-b; iii-a, e, f; iv-d
2. i-a, b; ii-c; iii-d; iv- e, f.
3. i-a; ii- b; iii- c, e; iv-f.
4. i-c, ii-a,b; iii-e, f; iv-d;

The half-leaf experiment, where a part of the leaf is enclosed in a test tube containing some KOH soaked cotton was performed, which showed that _________ was required for photosynthesis?
a. Light
b. Chlorophyll
c. CO2
d. O2