Refer to the diagram below showing the light absorption of green alga and purple
ID: 147639 • Letter: R
Question
Refer to the diagram below showing the light absorption of green alga and purple sulfur bacteria. Ulva sp. (areen alga) Purple sulfur bacteria Low 300 400 500 600 700 800 900 1000 Wavelength inm 11. Which of the following can be concluded from the spectroscopy data shown in the diagram? a. Purple sulfur bacteria use nitrogen as an clectron acceptor b. Purple sulfur bacteria are able to grow under layers of green algae. c. Algae are entirely dependent on purple sulfur bacteria. d. Bacteria do not contain bacterioc hlorophyll e. Purple sulfur bacteria photosynthesize only in cloudy weather.Explanation / Answer
The correct option is (B) that purple sulfur bacteria are able to grow under layers of green algae.
Because after seeing the graph it is evident that the relative absorption of green algae is higher as compared to purple sulfur bactera .
That means, if the following two bacteria are present in the water body then the green algae will be found on upper surfaces because it needs high amount of light for carrying out photosynthesis , while the purple sulfur bacteria will be found in lower levels as they do not require much light.
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