Q14 of 38 Page 106

Which of the statement is incorrect?

Green plants and blue-green algae produces their food from inorganic compounds in presence of radiant energy. This process is known as Photosynthesis. So, statement B is incorrect.

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12

In the following groups of materials, which group (s) contains only non-biodegradable items?

i. Wood, paper, leather


ii. Polythene, detergent, PVC


iii. Plastic, detergent, grass


iv. Plastic, bakelite, DDT

 13

Which of the following limits the number of trophic levels in a food chain?

 15

Which group of organisms are not constituents of a food chain?

(i) Grass, lion, rabbit, wolf


(ii) Plankton, man, fish, grasshopper


(iii) Wolf, grass, snake, tiger


(iv) Frog, snake, eagle, grass, grasshopper

 16

The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about