Question 1 :
<p>To show how many organisms are present at each level of a food chain, ecologists use a model called</p>

Question 4 :
Which of the following is a primary consumer in maize field ecosystem{tex}?{/tex}

Question 6 :
Identification and enumeration of plant and animal species of an ecosystem gives its

Question 8 :
<p>Catalytic converters</p><p>I. These are fitted into automobiles for reducing emission of poisonous gases like <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09bdd6c869438cbeeb33c"/>and CO</p><p>II. They have expensive metals like platinum, palladium and rhodium as catalysts</p><p>III. As the exhaust emission passes through catalytic converter nitric oxide splits into nitrogen and oxygen: carbon monoxide is oxidized to carbon dioxide and unburnt hydrocarbons get burnt completely into <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09bda6c869438cbeeb332"/>and <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09bdc034cc06301290d14"/></p><p>IV. Motor vehicles fitted with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst</p><p>Which of the statements given above are correct about catalytic converters?</p>

Question 9 :
A. GFC is major conduit of energy flow in aquatic ecosystem <br>B. Food chain maintains stability in an ecosystem by providing alternate organisms at different trophic level.<br>C. DFC may be connected to GFC.

Question 12 :
<p>Association of animals belonging to different species, where both partners are benefitted, is called</p>

Question 13 :
How much portion of the par is captured by the plants?

Question 14 :
Which of the following factors cannot be regarded as belonging to a non-living environment

Question 18 :
<p>There are two optional ways of exploitation. One way is parasitism. Which is the other one?</p>

Question 19 :
<p>Only a small amount of the energy stored in food is available to the next organism in a food chain because</p>

Question 20 :
Many freshwater organisms cannot live for long in seawater because the surrounding water will be ____to body cells and _____ may occur.

Question 22 :
Which of the following is not an invasive alien species in the Indian context?

Question 23 :
<p>When Darwin spoke of the struggle for existence and survival of the fittest in the nature, he was conveinced that</p>

Question 24 :
<p>Competition is best defined as a process in which the fitness of one species (measured in terms of its ‘<img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed0aa398ccf4a7e964346c7"/>’ the intrinsic rate of increase) is significantly</p>

Question 25 :
Which of the following accounts for the formation of major biomes?

Question 27 :
<p>A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this</p><p>I. Lots of urea and phosphate fertilizers were used in the crops in the vicinity.</p><p>II. The area was sprayed with DDT by an aircraft.</p><p>III. The lake water turned green and stinky.</p><p>IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.</p><p>Which two of the above were the main causes of fish mortality in the lake?</p>

Question 28 :
Which one of the following is the characteristic feature of cropland ecosystem?

Question 29 :
Assertion (A) Secondary air pollutants are formed by interaction among the primary pollutants and are more toxic. <br>Reason (R) DDT is a secondary air pollutant.

Question 31 :
<p>Study the diagram carefully and fill in the blanks</p><p><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a9422391749b43d0dd3"/></p><p>Choose the correct option for <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a74034cc06301290c87"/>and <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a756c869438cbeeb2ac"/></p>

Question 33 :
Assertion : Individual is the unit of Ecology.<br>Reason : Biome occurs at the top of ecological hierarchy.

Question 34 :
Who defined ecology as the study of the relations of all organisms to all its environments?

Question 35 :
Assertion (A) The rate of decomposition of detritus is reduced in the regions of high altitude. <br>Reason (R) It happens due to the immobilisation of nutrients.

Question 36 :
<p> <font face="Cambria Math, serif">Phenotypic variants formed in a population due to change in environment are called</font></p>

Question 38 :
<p> <font face="Cambria Math, serif">The species listed in Red Data Book are</font></p>

Question 40 :
<p> <font face="Cambria Math, serif">Detritus food chain law accounts for more energy flow than garzing food chain because</font></p>

Question 41 :
<p> <font face="Cambria Math, serif">A lion that eats a zebra that ate grass is a</font></p>

Question 44 :
<p> <font face="Cambria Math, serif">The diagram below show the biomagnification of DDT in an aquatic food chain. Choose the correct statement regarding this</font></p> <p> <img style='object-fit:contain' align="bottom" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ff7efccf055a67f16a226d7"/> </p> <p> <font face="Cambria Math, serif">I. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels</font></p> <p> <font face="Cambria Math, serif">II. High concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshell and their premature breaking</font></p> <p> <font face="Cambria Math, serif">III. River water may have a very low concentration of DDT, but the carnivorous fish in that river may contain high concentration of DDT, which is still suitable for consumption by human beings</font></p> <p><font face="Cambria Math, serif">Which of the statements given above are correct?</font></p>

Question 45 :
<p> <font face="Cambria Math, serif">Measuring Biological Oxygen Demand (BOD) is a method used for</font></p>

Question 49 :
Following arrangement is correct from the point of view of decreasing biodiversity in angiosperms (N), fungi (F), pteridophytes (P) and algae (A)

Question 52 :
<p>One model that shows how energy passes from one trophic level to another trophic level is called</p>

Question 54 :
<p>Complete the following model of carbon cycle filling <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a5a22391749b43d0d97"/>and <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a5a22391749b43d0d98"/></p><p><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ed09a5b8ccf4a7e9643412f"/></p>

Question 56 :
<p> <font face="Cambria Math, serif">Competition for light, nutrients and space is most severe between</font></p>

Question 57 :
<p> <font face="Cambria Math, serif">Desertification</font></p> <p> <font face="Cambria Math, serif">I. conversion of former moist and fertile land into arid desert area</font></p> <p> <font face="Cambria Math, serif">II. is a product of soil erosion</font></p> <p> <font face="Cambria Math, serif">III. desertified area cannot be put to any use</font></p> <p><font face="Cambria Math, serif">Which of the statements given above are correct?</font></p>

Question 58 :
<p align="justify"> <font face="Cambria Math, serif">Study of environmental and animal relation is</font></p>

Question 59 :
<p> <font face="Cambria Math, serif">You never see any cattle or goat browsing on </font> <img style='object-fit:contain' align="absmiddle" src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ff7ff11bd5c2b66ba9ee001"/> <font face="Cambria Math, serif"> due to</font></p>

Question 61 :
<p> <font face="Cambria Math, serif">Periodic departure and return of an individual in a population is known as</font></p>

Question 62 :
<p align="justify"> <font face="Cambria Math, serif">Root cap is not found in</font></p>

Question 63 :
<p> <font face="Cambria Math, serif">The largest endangered bird in India is</font></p>

Question 65 :
Match column-I with column-II and choose the correct option. <table> <tbody> <tr> <td>Column-I</td> <td>Column-II</td> </tr> <tr> <td>A. DDT</td> <td>I. CH$_4$ , CO$_2$</td> </tr> <tr> <td>B. Platinum- palladium</td> <td>II. SO$_2$ and Rhodium</td> </tr> <tr> <td>C. Acid rain</td> <td>III. Biological magnification</td> </tr> <tr> <td>D. Global warming</td> <td>IV. Catalytic converter</td> </tr> </tbody> </table>