THE ECOSYSTEM

THE ECOSYSTEM
1. Man in ecosystem is

a. Producer b. Primary consumer c. Secondary consumer d. Both b and c

2. Where there is no difference?

a. T1 and herbivores b. Primary consumers and herbivores

c. Primary carnivores and T2 d. Secondary consumers and herbivores

3. The ultimate tropic level in a food chain is occupied by

a. De composers b. Top consumers c. Tertiary consumers

d. Producers

4. In a predator (grazing) food chain

a. Organic food is dead matter like fallen leaves

b. Organic food is obtained by killing the prey

c. Organic food is manufactured by autotrophs

d. Food taken from host

5. Which is the most recently discovered ecosystem?

a. Tundra b. Iceberg c. Crater d. Vent

6. The stability of a grassland ecosystem depends upon

a. Carnivores b. Grazers c. Both d. Neither

7. Savannahs are

a. Tropical rain b. Desert scrubs c. Grasslands with scattered trees

d. Dense forests

8. The most productive agroe ecosystem is of

a.Sugarcane b. Wheat c. Maize d. Rice

9. A habitat with long severe winter and growing season of few months of summer form

a. Grasslands b. tundra ecosystem c. Taiga d. Savannah

10. Most delicate and fragile biome is

a. Tundra b. Taiga c. Savannah d. Estuary

11. Which animal is common in eutrophic lakes?

a. Hilsa b. Caribou c. Tubifex d. Chironomous larva

12. Abyssal zone in ocean has

a. No light but consumers and decomposers present b. No light but contains producers

c. No light but contains organisms d. Sunlight as well as producers

13. Which of the following belong to the category of promary consumers

a. Insects & Cattle's b. Snakes & Frogs c. Fishes d. Eagles

14. The type of food chain in which organic matter is decomposed by microbes and converted

into energy rich compounds is called

a. Deritus food chain b. grazing food chain c. Cybernetics d. None of these

15. In a food chain the largest population is that of

a. Primary consumers b. Secondary consumers c. Producers d. De composers

16. Pyramid of numbers is upright in

a. Grassland ecosystem b. Tree ecosystem c. Pond ecosystem

d. None of these

17. The shape of pyramid of numbers in a pond ecosystem is

a. Linear b. Spindle c. Upright d. Inverted

18. The pyramid of numbers deals with the number of

a. Species in a given area b. Sub species in a community

c. Individuals in a community d. Individuals in a tropic level

19. Niche represents

a. Habitat b. Microhabitat c. Habitat and climate d. Habitat and function

20. Maximum solar energy can be trapped by

a. Growing algae in large tanks b. Planning trees c. Growing grasses

d. Cultivation of more crop plants

21. Which one has the maximum biomass?

a. Temperate forest b. Tropical forests c. Alpine vegetation d. Taiga

22. Biomass produced by plants in oceans accounts for

a. 85% b. 75% c. 65% d. 55%

23. The rate at which new tissues are formed in producers in the ecosystems is

a. NPP b. GPP c. NSP d. GSP

24. The rate of storage of organic matter not used by heterotrophs is termed as

a. GPP b. NPP c. SP d. NP

25. Which has lowest productivity?

a. Ocean b. Forest c. Cornfield d.Grassland


ANSWERS

1. d 2. b 3. a 4.c 5. d 6. b 7. c 8. a 9.b 10. a

11. d 12. a 13. a 14. a 15. c 16. a 17. c 18. d 19. d 20. a

21. b 22. a 23. a 24. 25. d