Question Text
Question 1 :
Which of the following steps is not taken for reducing vehicular pollution?
Question 2 :
Acacia trees endure a 7 -month dry season in the African savanna by dropping their leaves. This adaptation allows the trees to
Question 3 :
A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this. <br>(i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity<br> (ii) The area was sprayed with DDT by an aircraft <br>(iii) The lake water turned green and stinky <br> (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Question 5 :
Food chain in which microorganisms breakdown the food formed by primary producers is
Question 6 :
Which of the following sets consists of endangered wild life species of India?
Question 7 :
Some stages in the hydrarch are labeled as <br>A. Marsh meadow stage <br>B. Reed swamp stage <br>C. Rooted Submerged stage <br>D. Phytoplankton stage <br>E. Forest stage <br>Identify the choice that represents the correct sequence of these stages.
Question 8 : Which of the following are correct matching pairs:<br><table><tr><th></th><th>Species 1</th><th>Species 2</th><th>Name of the interaction</th></tr><tr><td>(i)</td><td>-</td><td>0</td><td>A. Mutualism</td></tr><tr><td>(ii)</td><td>+</td><td>-</td><td>B. Competition</td></tr><tr><td>(iii)</td><td>+</td><td>0</td><td>C. Parasitism</td></tr><tr><td>(iv)</td><td>+</td><td>+</td><td>D. Commensalism</td></tr><tr><td>(v)</td><td>-</td><td>-</td><td>E. Ammensalism</td></tr></table>
Question 9 :
Which of the following features would be characteristic of the stratosphere but not of the troposphere?
