Question

Which of the following is wrongly matched?
A) Joseph Priestley- showed that plants release oxygen
B) Jan ingenhousz- showed that sunlight is essential for photosynthesis
C) Sachs- plants produce glucose/starch
D) Engelmann- green substance is located within special bodies in plants

Answer 1

Engelmann in his experiment demonstrated that red and blue light are the most effective energy source for photosynthesis.

Complete answer:
Joseph Priestley experiments was to find the importance of air for the growth of plants, he used candles and mouse set along with green plants in a bell jar and on the basis of survival of mouse and fire on candle ge stated that green plants provide oxygen. Jan Ingenhousz in 1779 discovered that sunlight is essential for plants by placing some plants in water, when placed in sunlight there could be presence of bubbles and when placed in dark bubbles stopped appearing and hence it was said that plants require sunlight to survive. Julius von sachs in 1865 proved that the presence of green substance or chlorophyll is confined to special bodies in the cell and not found diffused with the cell and named those special bodies as chloroplasts, in 1862 he demonstrated that starch is present in the chloroplast and is the product of photosynthesis.

Hence, the correct answer is option ‘D’.

Note: Engelmann used while light which is passed through prison and then exposed to algae to the different wavelengths of visible light spectrum, he used aerobic bacteria along with algae to determine the segment responsible for performing photosynthesis and found that bacteria were aggregated towards the party near the red and blue light.