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BIO-GEOGRAPHY MCQs

BIO-GEOGRAPHY
1. What happens to the soil, where soil water freeze and its tends to form ice layers parallel with ground surface?
a. It heaves the soil upward in an uneven manner
b. It heavens the soil downward in an uneven manner
c. It heaves the soil both upward and downward in an even manner
d. It remains unaffected
2. What soil particles are present in loamy soils?
a. Sand particles
b. Clay particles
c. Slit particles
d. All type of particles
3. Soil water available to plants is maximum in
a. Clayey particles
b. Silty soil
c. sandy soil
d. loamy soil
4. Capillaries are most effective in
a. Clayey soil
b. Silty soil
c. Sandy soil
d. Loamy soil
5. Salinisation occurs when the irrigation water accumulated in the soil evaporates, leaving behind salts and minerals. What are the effects of salinization on the irrigated land?
a. It greatly increases the crop production
b. It makes some soils impermeable
c. It raises the water table
d. It fills the air spaces in the soil with water
6. Which one of the following plants have nitrogen- fixing capacity?
a) Rice and wheat
b) Maize and sugarcane
c) Jute and rice
d) Gram and other pulses
7. The plants growing in water are called
a. Hydrophytes
b. Xerophytes
c. Hygrophytes
d. Mesophytes
8. The smallest distinctive division of the soil of a given area is
a. Pedon
b. Polypedon
c. Horizon
d. Soil profile
9. Plants growing in areas of high temperature are called
a. Microtherms
b. Megatherms
c. Mesotherms
d. Endotherms
10. Minor climatic variations in the environment lead to
a. Modification in plant bodies
b. Exclusion of most of the existing plant species
c. Better development of the plant bodies
d. No change in the character of the vegetation
ANSWER: 1.A 2 D 3A 4 D 5.B 6.D 7.A 8.B 9.B 10A

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