The photoautotrophic organisms that do not split water to obtain reducing power are 

(1) purple bacteria 

(2) cyanobacteria

(3) green plants

(4) none of these

Blackman's law is related to 

(1) respiration

(2) transpiration

(3) root pressure

(4) photosynthesis.

Which one of the following categories of organisms do not evolve oxygen during photosynthesis?

(1) Red algae

(2) Photosynthetic bacteria

(3) C₄ plants with Kranz anatomy

(4) Blue green algae

Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is 

1. calcium oxide

2. distilled water

3. potassium hydroxide solution

4. sodium carbonate.

Match the Columns.

Code 

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

   Column – I                                                    Column - II

i.Jan Ingenhousz                                            a. discovery of O2

ii. Joseph Priestley                                          b. Plants restore to the air whatever breathing

                                                                        animals and burning candles remove.

iii. T.W Englemann                                          c. showed that only the green part of the plants could release oxygen.

iv. Julius von scahs                                         d. discovery of production of glucose in plants

                                                                    e. first action spectrum of photosynthesis.

                                                                    f. Using a prism he split light into its spectral components and then 

                                                                       illuminated Cladophora, placed in a suspension of aerobic bacteria.

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

Cornelius van Niel, who, based on his studies demonstrated that photosynthesis is essentially a light-dependent reaction performed his experiments on-
a. Cladophora
b. purple and green bacteria
c. green algae
d. Non sulphur bacteria

Which of the following statement is correct?