Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?
Match the following scientists in Column I with their significant contributions in Column II concerning photosynthesis: Column I (Scientist) A. Joseph Priestley B. Jan Ingenhousz C. Julius von Sachs D. T.W. Engelmann E. Cornelius van Niel Column II (Contribution) i. Showed that sunlight is essential for the plant process that purifies air. ii. Demonstrated that O₂ evolved by green plants comes from H₂O, not from carbon dioxide. iii. Provided evidence for production of glucose when plants grow, stored as starch. iv. Performed experiments revealing the essential role of air in the growth of green plants. v. Described the first action spectrum of photosynthesis using aerobic bacteria. Which of the following is the correct match?
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