Question 3 :
Match the names of organisms with the ecological&#160;names given below. Choose the answer which gives the correct combination of the two columns.<br/><table class="wysiwyg-table"><tbody><tr><td><b>Organisms</b></td><td><b>Ecological names</b></td></tr><tr><td>A. Grass</td><td>p. Decomposer</td></tr><tr><td>B. Grasshopper</td><td>q. Secondary carnivore</td></tr><tr><td>C. Frog</td><td>r. Producer</td></tr><tr><td>D. Hawk</td><td>s. Primary consumer</td></tr><tr><td></td><td>t. Primary carnivore</td></tr></tbody></table>

Question 4 :
The amount of usable energy remains constant as it is passed from one trophic level to another.

Question 8 :
Select the option that correctly identifies A, B and C in the given table.<table class="wysiwyg-table"><tbody><tr><td>Organism</td><td>Trophic level</td><td>Food chain</td></tr><tr><td>Eagle</td><td>A</td><td>Grazing</td></tr><tr><td>Earthworm</td><td>Primary consumer</td><td>B</td></tr><tr><td>Frog</td><td>C</td><td>Grazing</td></tr></tbody></table>

Question 9 :
Which of the following consequences is due to the over exploitation of natural resources by man?

Question 11 :
All of the following are components that make up an ecosystem except<b>&#160;</b><br/>

Question 12 :
The first link in any food chain is always a green plant, because<br/>

Question 15 :
A considerable part of the harmful ultraviolet radiation of the Sun does not reach the surface due to:<br/>

Question 19 :
The allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere. What element is this?

Question 20 :
In the following groups of materials, which group(s) contains only non-biodegradable items?

Question 27 :
Assertion: Ozone is getting depleted due to $CFC_s$ Reason: With the depletion of ozone layer more UV radiation filters into troposphere