Question # 1

Which of the following is not an example of green house gas?

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CO₂

Methane

Oxygen

Nitrous oxide

Biospher surrounding the earth is about:

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17 km

18 km

19 km

20 km

Example of Ectoparasite is:

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Becteria

Virus

Ascaris

Mosquito

Naturally found in graphite and diamond.

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Nitrogen

Oxygen

Hydrogen

Carbon

Example of Endoparasite is.

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Plasmodium

Mosquito

Leech

Lices

All Ecosystem of the world join and makes.

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Biosphere

Heterosphere

Geosphere

Hydrosphere

During nitrogen fixation nitrogen is converted into:

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Nitrates

nitrates

ammonia

all to these

In the food chain"grass......rabbit....... fox..............bear...........mushroom", how many types of decomposers are present"?

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1

2

3

4

The populations that live in a habitat nad interact with one another are collectively called:

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Biosphere

Ecosystem

Community

Species

The thickness of biosphere is:

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02 km

20 km

50 km

200 km

All ecosystems of the world combine to form.

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Community

Population

Biosphere

Competition

The lowest trophic level of an ecosystem always includes.

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Herbivores

Carnivores

Producer

Decomposers

The producers of ecosystem are:

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fungi

bacteria

green plants

man

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