Correct : A. are small solid particles and liquid droplets
3. All are particulate pollutants except
Correct : B. ozone
4. Fine organic or inorganic particles suspended in air is called
Correct : C. aerosol
5. Which of the following is a secondary pollutant
Correct : C. O3
6. Air pollution can be of
Correct : C. both a and b
7. Mobile combustion accounts
Correct : C. 50-60 % of air pollution
8. The true statement about ‘green house effect’ is that it is
Correct : C. caused only by CO2, CFC, CH4 and NO2 gases
9. The supersonic jets cause pollution by the thinning of
Correct : C. O3 layer
10. Carbon mono oxide is a pollutant because
Correct : D. reacts with haemoglobin
11. A population is a group of
Correct : A. individuals in a species
12. What is the most important factor for the success of animal
population?
Correct : B. adaptability
13. The formula for exponential population growth is
Correct : A. dN/dt = rN
14. Human population growth curve is a:
Correct : C. J shaped curve
15. Exponential growth occurs when there is
Correct : B. no environmental resistance
16. A human population is small, there is a greater chance of :
Correct : B. genetic drift
17. In a population, unrestricted reproductive capacity is called as
Correct : C. birth rate
18. The concept that 'population tends to increase geometrically while food supply increases arithmetically’ was put forward by
Correct : C. Thomas Malthus
19. Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called
Correct : B. mortality
20. The carrying capacity of a population is determined by its
Correct : D. limiting resources
21. The major pollutant from automoblie exhaust is
Correct : B. CO
22. The green house gases, otherwise called radioactively active
gases includes
Correct : D. All of these
23. Algal bloom results in
Correct : C. Eutrophication
24. A high Biological Oxygen Demand (BOD) indicates that:
Correct : D. High level of microbial pollution
25. The effects of radioactive pollutants depends upon
Correct : D. all of these
26. The range of normal human hearing is in the range of
Correct : C. 50Hz to 15000 Hz
27. The pollution which does not persistent harm to life supporting system is
Correct : A. Noise pollution
28. Soap and detergents are the source of organic pollutants like:
Correct : D. all of these
29. Growing agricultural crops between rows of planted trees is
known as
Correct : C. Taungya system
30. The main atmospheric layer near the surface of earth is
Correct : A. troposphere
31. Man made sources of radiation pollution are:
Correct : D. all of these
32. The cutting down of trees and setting them on fire and raising
crops on the resulting ash is called:
Correct : B. Jhum
33. Percentage of forest area recommended by the the national
forest policy for plains is
Correct : A. 33%
34. Example of primary pollutant
Correct : D. hydrocarbons
35. Commonly used radioactive isotopes in scientific research
Correct : D. all of these
36. Drinking of fluoride containing water results :
Correct : A. fluorosis
37. Chipco movement is a public agitation that occurred in
Correct : D. Tehri Garhwal area of Uttar Pradesh
38. High biological oxygen demand indicates:
Correct : C. intense level of microbial pollution
39. Ozonosphere seen in
Correct : D. stratosphere
40. Harmful trace metals in fly ash:
Correct : D. all of the above
41. In a pyramid of numbers, in a grassland ecosystem, the largest
population is that of
Correct : A. Producers
42. Which of the following statements regarding species
interdependence are true? A) An association of two species where one is benefitted and other remains unaffected called mutualism B) An interspecific association where both partners derive benefit from each other is called commensalism C) A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D) A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis.
Correct : B. C and D only
43. The formula of growth rate for population in given time is
Correct : D. dN/dt=rN
44. One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as
Correct : B. CFCs and N2O
45. Which of the following is false?
Correct : B. The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
46. Many freshwater animals cannot live for long in sea water
and vice versa mainly because of the
Correct : D. Osmotic problems
47. Which of the following regarding ecological pyramids is not correct?
Correct : A. In most ecosystems, the pyramid of numbers and biomass are up right