Q9 of 35 Page 130

Observe the following Bio-geo chemical cycle.


i) Mention the nutrient in the given cycle.


ii) Write the activities from ‘A’ to ‘D’.

(i) The nutrient in the given cycle is carbon.

(ii) The various activities taking place in the given cycle are:


A: Photosynthesis


Reasoning: Green plants take carbon dioxide from atmosphere for photosynthesis.


B: Respiration


Reasoning: Plants and animals exhale carbon dioxide during respiration process.


C: Combustion


Reasoning: Fuels need oxygen for their combustion, which they get from the atmosphere.


D: Decomposition


Reasoning: Micro-organisms decompose dead organisms and the gases produced so are released into the atmosphere.


More from this chapter

All 35 →
8

Observe the following food web:


(i) Find out the wrong statement:


a) ‘A’ is a producer


b) ‘F’ is a herbivore


c) ‘H’ is an omnivore


d) ‘I’ is a climax carnivore

 8

Observe the following food web:


Find out how many food chains are present in the above food web.

 10

Study the food chain below, correct it and convert it into a pyramid of energy.

Mulberry → Sparrow → Caterpillar → Kite

 11

Study the illustration and answer the questions:

i) Which line (A or B) represents the flow of energy?


Why do you say so?


ii) Give an example of a decomposer.