Organisms and Populations MCQs Mock Test of Class 12th Biology

Welcome to your Organisms and Populations MCQs Mock Test of Class 12th Biology

1. 
Q.1 Niche is defined as
2. 
Q.2 It natality is balanced by mortality in a population at a given time, there will be a/an
3. 
Q.3 Mycorrhiza is an example of
4. 
Q.4 The interspecific interaction in which one partner is benefitted and the other is unaffected (neutral), is called
5. 
Q.5 Individuals of one kind, i.e., one species occupying a particular geographic area, at a given time form a/an
6. 
Q.6 Amensalism is an association between two species where
7. 
Q.7 Parasites that feed on the external surface of the host organism are called
8. 
Q.8 The number of birth during a given period in the population that are added to the initial density is referred to
9. 
Q.9 Autecology is the
10. 
Q.10 Ecotone is:
11. 
Q.11 Biosphere is:
12. 
Q.12 A stage of suspended development is called
13. 
Q.13 Both the species benefit in
14. 
Q.14 One species benefit in
15. 
Q.15 The interaction where one species is benefitted and the other is neither benefitted nor harmed is called
16. 
Q.16 If one species is harmed whereas the other is unaffected is called
17. 
Q.17 Ecological niche is:
18. 
Q.18 According to Allen’s Rule, the mammals from colder climates have:
19. 
Q.19 Salt concentration (salinity) of the sea measured in parts per thousand is:
20. 
Q.20 Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
21. 
Q.21 Which of the following forest plants controls the light conditions at the ground?
22. 
Q.22 Niche is defined as
23. 
Q.23 It natality is balanced by mortality in a population at a given time, there will be a/an
24. 
Q.24 Mycorrhiza is an example of
25. 
Q.25. Lichens are the associations of:
26. 
Q.26. A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
27. 
Q.27. Which of the following is a partial root parasite?
28. 
Q.28. Plant groups growing in zones where high temperature alternates with low temperature as called as:
29. 
Q.29. When one population is harmed and the other remains unaffected the relationship is called as:
30. 
Q.30. According to Mr. Dougal, the parasitism caused due to fungi and bacteria represent interspecific relationship which is:
31. 
Q.31. Biosphere is:
32. 
Q.32. According to Allen’s Rule, the mammals from colder climates have:
33. 
Q .33. Salt concentration (salinity) of the sea measured in parts per thousand is:
34. 
Q.34. Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
35. 
Q.35. Ecological niche is:
36. 
Q. 36. Which of the following forest plants control the light conditions at the ground?
37. 
Q.37. Autoecology is the:
38. 
Q.38. What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
39. 
Q.39. Ecotone is:
40. 
Q.40. If a population of 50 Paramoecia present in a pool increases to 150 after an hour, what would be the growth rate of population?
41. 
Q.41. What parameters are used for tiger census in our country’s national parks and sanctuaries?
42. 
Q.42. A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
43. 
Q.43. Which of the following would necessarily decrease the density of a population in a given habitat?
44. 
Q.44. In 2005, for each of the 14 million people present in a country, 0.028 were born and 0.008 died during the year. Using exponential equation the number of people present in 2015 is predicted as:
45. 
Q.45. Which one of the following organisms reproduces sexually only once in its life time?
46. 
Q.46. The relationship between a climber and the host corresponds to:
47. 
Q.47. Amensalism is an association between two species where:
48. 
Q.48. The relationship between the alga Cladophora and the snail shell on which it grows corresponds to:
49. 
Q49. Habitat together with functions of a species constitute its:
50. 
Q50. The maximum growth rate occurs in :

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