12th class (Fsc) Biology unit 12 MCQs
chapter 12 MCQs 12th Class Biology
Some Major Ecosystem:
1. The soil or terrestrial ecosystem have some adaptations for animals and plants:
a. Temperature
b. Supporting tissues
c. Nutrients
d. Retention of food
2. In aquatic ecosystem near shore zone is called:
a. Produndal zone
b. Littoral zone
c. Benthic zone
d. Limnetic zone
3. Fresh water ecosystem covers less than:
a. 3%
b. 7%
c. 1%
d. 5%
4. The productivity can be indicated by:
a. Consumption of O2
b. Consumption of CO2
c. Evolution of N2
d. Evolution of CO2
5. The productivity of aquatic ecosystem is determined by light and:
a. Nutrients
b. CO2
c. Water
d. Temperature
6. Here light is insufficient to support photosynthesis:
a. Profundal zone
b. Littoral zone
c. Photoplankton zone
d. Limnetic zone
7. The zone rich in life in a fresh water lake is called:
a. Profundal zone
b. Littoral zone
c. Desert
d. Limnetic zone
8. The producers in limnetic zone are:
a. Hydrilla
b. Amoebae
c. Crustaceans
d. Cyanobacteria
9. Light is insufficient to support photosynthesis in:
a. Profundal zone
b. Littoral zone
c. Phytoplankton zone
d. Limnetic zone
10. Ecosystem present on land or soil is called:
a. Terrestrial
b. Atmosphere
c. Lithosphere
d. Both A and B
11. What biome has the richest soil with nutrients and can be converted into agriculture?
a. Grass land
b. Deciduous forest
c. Coniferous forest
d. Tropical rain forest
12. The average rainfall in temperature deciduous forest is between:
a. 700-1500 mm
b. 600-1500 mm
c. 750-1500 mm
d. 650-1500 mm
13. The biome, which has very fertile soil, rich in organic matter with maximum water holding capacity is:
a. Grassland
b. Alpine forest
c. Desert
d. Temperate deciduous forest
14. Coniferous forest located at high latitude are called:
a. Taiga
b. Alpine
c. Prairies
d. Boreal
15. Temperature deciduous forests are located in Pakistan at:
a. Mianwali
b. Shogran
c. Sindh
d. Chilas
16. Northern coniferous forests are called:
a. Taiga
b. Alpine
c. Prairies
d. Boreal
17. Coniferous forest located at high altitude are called:
a. Arctic
b. Boreal
c. Tundra
d. Alpine
18. Chilas has major terrestrial ecosystem:
a. Tundra
b. Deciduous forest
c. Grass land
d. Alpine forest
19. The scientific name for rhesus monkey is:
a. Felis catus
b. Macaca mullata
c. Solenorctor tibetanus
d. Taxus bacceta
20. The zoological name of leopard cat is:
a. Felis pardous
b. Felisdomestica
c. Felis bengalensis
d. Felis-leo
21. The Macaca mulatta is biological name for:
a. Deer
b. Black bear
c. Rhesus monkey
d. Cat
22. A dominant plant of the deciduous forest is the:
a. Acacia
b. Cactus
c. Taxus baccata
d. Euphorbia
23. Most plants fit only into few ecosystems which type of plants seem to fit into ecosystem of grass land:
a. Perennial herbs
b. Trees
c. Annual weeds
d. Shrubs
24. Layering is the characteristics of:
a. Taiga
b. Tundra
c. Grass land
d. Desert
25. In temperature grassland the rate of primary production is about:
a. 700-1800 g/cm2
b. 700-1400 g/cm2
c. 700-1500 g/cm2
d. 700-1600 g/cm2