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Biology MCQS[NEET-2021 to 2022]-Ecology-II

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1. Carbon dioxide is called green-house gas because it is




2. Trichoderma harzianum has proved a useful microorganism for:




3. The slow rate of decomposition of fallen logs in nature is due to their:




4. Which one of the following is not a bioindicator of water pollution




5. Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?




6. Which one of the following is not a functional unit of an ecosystem?




7. The upright pyramid of number is absent in




8. Which one of the following is not a gaseous biogeochemical cycle in ecosystem?




9. Identify the possible link "A" in the following food chain: Plant → insect → frog → "A" → Eagle




10. The type of ecosystem with the highest mean plant productivity is




11. In an aquatic ecosystem, the trophic level equivalent to cows in grasslands is




12. The final stable community in ecological succession is




13. An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be having




14. Trophic levels in ecosystem is formed by :




15. "Complete competitors cannot coexist" is true for




16. Bell-shaped polygonal pyramid indicates




17. The age of pyramid with broad base indicates




18. Which one of the following ecosystem types has the highest annual net primary productivity?




19. A renewable exhaustible natural resource is




20. Competition is severe in a population that has a distribution which is




21. In a population, if the rate of addition of new members is higher than the rate of individuals lost, it shows




22. Which of the followings take part in symbiosis of lichen?




23. In an ecosystem Biotic factors affect the survival of an organism in that ecosystem. They include




24. Plant succession occurring in a sandy area is




25. The maximum amount of water that a soil can hold, by capillary action is called




26. In ecological succession from pioneer to climax community, the biomass shell




27. Individuals of a species which occur in a particular area constitute




28. The role of an organism in the ecological system is known as




29. Information about birth rate, death rate, sex ratio, age distribution etc. of a population is obtained from




30. Insectivorous plants are adopted to soils




31. Large Woody Vines are more commonly found in




32. Organisms that can tolerate and thrive in a wide range of temperatures are called




33. Pheromones, the chemical messengers produced by certain exocrine glands of skin, affect




34. Lead is one of the most serious environmental pollutants which affects




35. lf there was no CO2 in the atmosphere, the earth temperature would be




36. Which of the following pollutants is discharged by jet planes?




37. Lichens indicate pollution by




38. Which of the environmental pollutions can cause birth defects?




39. Major aerosol pollutant present in the jet plane emission is




40. Ultra-violet light causes




41. The ultraviolet radiations in the stratosphere are absorbed by




42. Maximum deposition of DDT will occur in




43. Maximum threat to the world is from




44. Minamata disease is due to pollution of




45. Montreal Protocol aims at




46. Most abundant water pollutant is




47. Most harmful environmental pollutants are




48. The atmosphere of big metropolitan cities is polluted most by




49. Community is




50. Which factor of ecosystem includes plants, animals and microorganisms?