Environment and Ecology: MCQ Set I

Environment and Ecology: MCQ Set I

1.Autecology is the:

a. Relation of a population to its environment

 b. Relation of an individual to its environment

c. Relation of a community to its environment

d. Relation of a biome to its environment

2. Ecotone is:

a. A polluted area

b. The bottom of a lake

 c. A zone of transition between two communities

d. A zone of developing community

3. Biosphere is:

 a. a component in the ecosystem

 b. composed of the plants present in the soil

c. life in the outer space

 d. composed of all living organisms present on earth which interact with the physical environment

4. Ecological niche is:

a. the surface area of the ocean

b. an ecologically adapted zone

 c. the physical position and functional role of a species within the community

 d. formed of all plants and animals living at the bottom of a lake

5. According to Allen’s Rule, the mammals from colder climates have:

 a. shorter ears and longer limbs

 b. longer ears and shorter limbs

 c. longer ears and longer limbs

d. shorter ears and shorter limbs

6. Salt concentration (Salinity) of the sea measured in parts per thousand is:

a. 10 – 15 b. 30 – 70 c. 0 – 5 d. 30 – 35

7. Formation of tropical forests needs mean annual temperature and mean annual precipitation as:

 a. 18 – 25°C and 150 – 400 cm b. 5 – 15°C and 50 – 100 cm c. 30 – 50°C and 100 – 150 cm d. 5 – 15°C and 100 – 200cm

8. Which of the following forest plants controls the light conditions at the ground?

 a. Lianas and climbers  b. Shrubs c. Tall trees d. Herbs

9. What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?

 a. It will grow normally b. It will grow well because it is planted in the same locality c. It may not survive because of change in its micro climate d. It grows very well because the plant gets more sunlight

10. If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the growth rate of population? a. 50 per hour b. 200 per hour c. 5 per hour d. 100 per hour

11. What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)? a. 100 b. 200 c. 50 d. 150

12. A population has more young individuals compared to the older individuals. What would be the status of the population after some years? a. It will decline b. It will stabilise c. It will increase d. It will first decline and then stabilize

13. What parameters are used for tiger census in our country’s national parks and sanctuaries?

 a. Pug marks only b. Pug marks and faecal pellets c. Faecal pellets only d. Actual head counts

 14. Which of the following would necessarily decrease the density of a population in a given habitat? a. Natality > mortality b. Immigration > emigration c. Mortality and emigration d. Natality and immigration

15. A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations? a. 128 b. 24 c. 64 d. 32

 16. 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: a. 25 millions b. 17 millions c. 20 millions d. 18 millions

17. Amensalism is an association between two species where: a. one species is harmed and other is benefitted b. one species is harmed and other is unaffected c. one species is benefitted and other is unaffected d. both the species are harmed

 18. Lichens are the associations of: a. bacteria and fungus b. algae and bacterium c. fungus and algae d. fungus and virus

19. Which of the following is a partial root parasite? a. Sandal wood b. Mistletoe c. Orobanche d. Ganoderma

 20. Which one of the following organisms reproduces sexually only once in its life time? a. Banana plant b. Mango c. Tomato d. Eucalyptus

21.Community is

a.Species structure and diversity index of an area b.Biomass c. Autotrophic and heterotrophic components d.All of these

22. Association between sea Anemone and Hermit crab in gastropod shell is that of

 A.Parasitism  B.Commensalism  C.Symbiosis D.Amensalism

23. Which of following statement is true about the Ecotone?
a.    It is meeting place of two different eco systems
b.    It is meeting place of two same eco systems
c.    Density of species is very low here
d.    All of  the above.

24.  What is the carbon credit?
a.    It is the difference between the carbon emission allowed and actually emitted carbon 
b.    It is the loan amount by IMF for reducing pollution 
c.    It is loan given to poor people for buying Modern Stoves 
d.    All of the above

25. In ecological terms, what does the term “standing crop” signify ?
a) total weight of whole organic matter
b) total weight of heterotrops
c) total area covered by crops
d) None of the above

26. Which among these is/are a cryogenic indicator of climate change ?
1. ice sheets and ice chores
2. sea level changes
3. lacustrine deposists
Select the correct answer using the codes given below.
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2 and 3

27. Which among the following are mechanical method of soil conservation ?
1. bunding
2. terracing
3. contour farming
4. stubble mulching
Select the correct answer using the codes given below.
a) 1, 2 and 3 only
b) 1 ,3 and 4 only
c) 2 ,3 and 4 only
d) 1 ,2, and 4 only

28.A mutually beneficial association necessary for survival of both partners is

(a) mutualism/symbiosis(b) commensalism(c) amensalism(d) both A and B.

29.Which of the following is a part of the biogeochemical cycle ?
1. soils
2. plants
3. atmosphere
4. oceans
Select the correct answer using the codes given below.
a) 1, 2 and 3 only
b) 1 ,3 and 4 only
c) 2 ,3 and 4 only
d) 1 ,2, 3 and 4

30.What does the high Biological Oxygen Demand (BOD) indicates?
a.    High level of Microbial Pollution 
b.    Low level of Microbial Pollution 
c.    Absence of Microbial Pollution
d.    Water is fully pure

ANSWERS OF MCQ
1.b 2.c 3.d 4.c 5.d 6.d 7.a 8.c 9.c 10.d 11.b 12.c 13.a 14.c 15.c 16.b 17.b 18.a 
19.a 20.c 21.d 22.c 23.a 24.a 25.a 26.a 27.a 28.a 29.d 30.a

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