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MCQ Questions for Class 12 Biology Set 7

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1. Avicennia, Rhizophora andAtriplex are:




2. Maximum amounts of humus occurs on:




3. Mycorrhiza is an example to:




4. Plants growing in saline soil with high salt concentration are:




5. When births are equal to deaths, it is:




6. Which plants is found in mangroove zone?




7. Soil transported by air is:




8. Who introduced term Ecosystem?




9. Soil developed from sedimented rock:




10. Best soil for plant growth is:




11. Soil particle determine the character of:




12. Plant roots soil water is:




13. Exchange of water in submerged plant:




14. Submerged Rooted Hydrophyte are:




15. Water co-deficient contains:




16. Xerophyte Contains:




17. Small extremite animals of tropicalregion:




18. Hibernation of some animals:




19. Physical and chemical properties of soil studied by :




20. Identity the Hetero Organism:




21. That animal who can bear one third loss of water of one third body weight is:




22. Root hair absent in:




23. A water co-efficient Mesophyte is:




24. Gravitated carried soil is:




25. Kanha National Park is famous for:




26. During food chain the maximum energy is stored in :




27. The average efficiency of energy transfer from herbivoure to carnivorce level is :




28. Ecological pyramids were first devised by:




29. Which of the following ecosystem has highest gross primary productivity:




30. In the phosphorus cycle, weathring makes phosophate available first to:




31. Which types of the following pyramid are never inverted?




32. Biosphere means:




33. Best type of pyramid which is always true is:




34. Decomposers are:




35. The largest ecosystem is :




36. More than 70 of world freshwater is contain in:




37. Which one of the following pair is mismatched?




38. Which of the following is the most stable ecosystem?




39. Primary succession occurs in :




40. Which one of the following is not used for construction of ecological pyramid?




41. What is the main cause of extinction of some species in tropical forests?




42. Ecology deals with:




43. Shola forests are found in :




44. Lion-tailed Macaque is found in:




45. Project tiger in India was started in the year:




46. Dudhwa National Part is located in:




47. Which type of living organisms given below are listed in Red Data Book”?




48. Reserve biosphere of Sundarban is situated in which of the following states :




49. Biodiversity Act of India was passed by the Parliament in the year:




50. Red Data Book is produced by: