BIOTIC COMMUNITY AND ECOSYSTEM
1. The most productive zone in a pond ecosystem is
a. Limnetic zone b. Profundal zone c. Pedonic zone d. Littoral zone
2. Coniferous forests reeeceive annually a maximum rain
a. 140 cm b. 75 cm c. 35 cm d. 10 cm e. None
3. Birds like eagle, hawk in a grassland ecosystem are regarded as,
a.Secondary consumers b. Primary consumers c. Microconsumers d. Tertiary consumers e. None
4. Study of fresh water ecosystem is termed
a. Aautecology b. Hydrology c. Synecology d. Limnology e. None
5. The base of a pyramid of energy occupied by
a. Herbivores d. Decomposers c. Producers d. Tertiary consumers e. None
6. The terminal animal in the given food chain
Phytoplankton——Zooplankton——Small fish——Frog—— Snake—— ? is
a. Man b. Bird c. Fungi d. Bacteria e. None
7. Primary consumers are
a. Producers b. Herbivores c. Carnivores d. Detritivores e. None
8. Niche means
a. Food habitat b. Living place c. Living place and food habit d. Reproductive rate e. None
9. Biological equilibrium is the
a. Producers b. Primary consumers c. Decomposers and producers
d. Producers, Consumers and Decomposers e. None
10.Species that occur in different geographical regions separated by special barriers
are a. Allopatric b. Autopatric c. Sympatric d. Allogenic e. None
11. Which of the following indicates ecological sequence
a. producers———————consumers———decomposers
b. decomposers —————consumers———producers
c. producers———————decomposers——consumers
d. consumers———————producers————decomposers
12. Eutrophication refers to
a. High production in an aquatic ecosystem b.Low production in a terrestrial ecosystem
c. Stable production in a terrestrial ecosystem d. Low production in an aquatic ecosystem e. None
13. Pyramids of numbers
a. is upright in all ecosystems b. upright in parasitic food chain c. Inverted in pond ecosystem
d. upright in grassland ecosystem as number decreases towards apex e. None
14. The term ecology was coined by
a. Haekel b. Tansely c. Odum d. Karl Mobius e. Liebig
15. A group of organisms forming an ecological unit is termed
a. Bioccoenosis b. Geobiocoenosis c. Both a & b d. None
16. The statistical study of the structure and functions of the ecosystem is termed
a. Demecology b. Systems ecology c. Autecology d. Synecology
17. Which of the following indicates single species ecosystem
a. Monoculture b. Multiculture c. Polyculture d. None
18. The scientific study of soil is termed
a. Pedology b. Edaphology c. Pomology d. Oncology e. None
19. The following is an instance of beneficial or co-operative interaction between different species
a. Predation b. Competition c. amensalism d. commensalism
20. The concept of ecological niche was introduced by
a. Elton b. Darwin c. Lamarck d. Smith e. None
21. The interactions among living organisms in a living community are collectively
called a. Biotic b. Abiotic c. Both a & b d. None of these
22. The term ecological pyramid was first used by
a. Charles Elton b. Charles Darwin c. Edwin mori d. Alexander flemming e. None of these
23. Hibernation exhibits by
a. Plants b. Animals c. Himalayan plants d. Polar animals e. None
24. The arrangement of various organisms in different layers in a community is called
a. Biomes b. deciduous forest c. Ecosystems d. Stratification e. None
25. Man made terrestrial ecosystem
a. Orchards b. Fish tanks c. Lakes d. Ectone e. None