1.
Soil chemistry is considered an __________ factor-
a. topographic
b. econtonal
c. biologic
d. edaphic

Option”D” is correct

Soil chemistry is considered an edaphic factor.
2. Trichodermaharzianum has proved a useful microorganism for-
a.
b.
c.
d.

Option”B” is correct

Trichoderma harzianum has proved a useful microorganism for bioremediation of contaminated soils.
3. The occurrence of pesticides like DDT in higher trophic levels is termed as-
a. bioremediation
b. biomagnification
c.
d. biopollution

Option”B” is correct

Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.
4. The study of food chains and food webs is observed in the phenomenon known as-
a. biological chain
b. ecosystem
c.
d.

Option”B” is correct

Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.
5.
BOD stands for-
a.
b.
c.
d.

Option”C” is correct

BOD stands for Biological Oxygen Demand. It is the amount of dissolved oxygen required by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
6. In a population, unrestricted reproductive capacity is called as-
a.
b.
c.
d.

Option”B” is correct

Biotic potential is defined as the physiological capacity of organisms to produce their offspring under natural conditions. It is also called reproductive potential. In nature, the biotic potential of organisms is enormous but all the organisms do not survive due to the lack of food and space.
7.
If there is no atmosphere, the colour of the sky will be-
a. white
b. colourless
c. blue
d. black

Option”D” is correct

If the Earth had no atmosphere then the sky would have looked dark. The original colour of the sky(or space) is black. Just the atmosphere of the Earth gives the colour white, blue and dark blue.
8. _________ is the study that deals with the interaction of organisms with their environment.
a. Etiology
b. Ecology
c. Botany
d. Biology

Option”B” is correct

Ecology is the scientific study of the interaction of organisms with each other and the environment.
9. What is an Incinerator?
a.
b.
c.
d.

Option”A” is correct

Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration and other high-temperature waste treatment systems are described as “thermal treatment”. Incineration of waste materials converts the waste into ash, flue gas and heat.
10. Air pollution can be of-
a.
b.
c.
d.

Option”C” is correct
Pages: 1 2 3 4 5 6 7

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