12th class (Fsc) Biology unit 11 MCQs
chapter 11 MCQs 12th Class Biology
Ecosystem:
1. The study of the relationships of organisms to their environment is known is:
a. Zoology
b. Biology
c. Mycology
d. Ecology
2. Similar group of individuals who can inter breed and produce organisms of their own kind forms a:
a. Species
b. Population
c. Succession
d. Community
3. When living and non-living interact to produce a stable system in which exchange of materials with flow of energy takes, place, it forms a/an:
a. Stable community
b. Environment
c. Ecological succession
d. Ecosystem
4. C. Eton defined the Niche as the species:
a. Pole
b. Behavior
c. Habitat
d. Address
5. The actual location of place, where an organism lives is called its:
a. Habitat
b. Niche
c. Ecosystem
d. Environment
6. Any group of inter breeding organisms of the same species that exist together in both time and space is called:
a. True breeders
b. Gene pool
c. Multiple alleles
d. Populations
7. Biome is a:
a. Regional community
b. Simple community
c. Climax community
d. Complex community
8. In 1917, term Niche was first proposed by American Ornithologist named:
a. Ernst Haeckel
b. Charles Eltarf
c. Lamarck
d. Joseph Grinnell
9. Study of single population’s relationship to its environment is called:
a. Niche
b. Autecology
c. Predation
d. Synecology
10. A localized group of individuals belonging to the same species is called as:
a. Ecosystem
b. Community
c. Biosphere
d. Population
11. The basic functional unit of ecology is:
a. Ecosystem
b. Niche
c. Community
d. Population
12. The abiotic component of an ecosystem is:
a. Consumer
b. Temperature
c. Decomposer
d. Producer
13. In root nudles bacteria convert nitrogen into:
a. Urea
b. Ammonia
c. Nitrate
d. Nitrates
14. The term niche was first proposed by Joseph Grinnell an American:
a. Ornithologist
b. Embryologist
c. Physiologist
d. Ecologist
15. Study of different communities with relation to environment is called:
a. Embryology
b. Synecology
c. Zoology
d. Autecology
16. Who proposed the term “Niche” in Ecology?
a. Elton
b. Haeckel
c. Darwin
d. Grinnell
17. Study of single population relationship to its environment is called:
a. Autecology
b. Parasitism
c. Synecology
d. Niche
18. The living organisms which cannot prepare their own food but obtain ready-made food from others, are:
a. Only primary consumers
b. Primary and secondary consumers
c. Consumers
d. Secondary and tertiary consumers
19. All the food chains and food webs begin with:
a. Decomposers
b. Primary consumers
c. Producers
d. Secondary consumers
20. Lithosphere includes:
a. Water
b. Earth soil
c. Gases
d. Air
21. The living organisms producing their own food:
a. Green plants
b. Heterotrophs
c. Decomposers
d. Consumers
22. The whole of the world land is called:
a. Hydrosphere
b. Lithosphere
c. Biosphere
d. Ecosphere
23. The distinct levels of food chain are called:
a. Trophic level
b. Food chain
c. Energy pyramid
d. Food web
24. In xerosere, polytrichum and tortula represent:
a. Foliage lichen stage
b. Herbaceous(plant) stage
c. Crustose lichen stage
d. Moss stage
25. Herbaceous stage in xerosere is the:
a. Fourth stage
b. First stage
c. Last stage
d. Third stage