Biodiversity & Conservation Chapter-Wise Test 11

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is a function of biodiversity?

Regulation of climate
Maintenance of soil fertility
Pollination and seed dispersal
All of the above
4

Biodiversity provides ecosystem services such as climate regulation, maintenance of soil fertility, pollination, nutrient cycling, and seed dispersal.

Which of the following is an incorrect statement about ecosystem diversity?

Ecosystem diversity refers to the diversity of habitats in a region.
Ecosystem diversity has no contribution to biodiversity.
Coral reefs and mangroves are examples of different ecosystems.
Ecosystem diversity is one of the three levels of biodiversity.
2

Ecosystem diversity is one of the three levels of biodiversity and refers to the variety of habitats and ecosystems present in a region.

What percentage of all described animal species are insects?

50%
60%
70%
80%
3

Insects constitute more than 70% of all described animal species.

Which type of conservation method is used in biosphere reserves?

Ex situ conservation
In situ conservation
Cloning
Artificial propagation
2

Biosphere reserves are examples of in situ conservation because species are protected in their natural habitats.

What does the rivet popper hypothesis illustrate about biodiversity loss?

Loss of one species does not affect ecosystems.
Ecosystems function better with fewer species.
Gradual species loss weakens ecosystems over time.
Species loss affects only certain ecosystems.
3

Paul Ehrlich's rivet popper hypothesis states that the gradual loss of species weakens ecosystem functioning, just as removing rivets weakens an aircraft.

Which of the following is a correct statement about invasive species?

Invasive species can disrupt native ecosystems.
Invasive species always increase biodiversity.
Invasive species never affect ecosystem balance.
Invasive species are beneficial to all ecosystems.
1

Alien invasive species may outcompete native species, alter habitats, and contribute to biodiversity loss.

Which of the following statements about species richness is incorrect?

Species richness is highest in tropical regions.
Species richness increases towards the poles.
Species richness is an important measure of biodiversity.
Higher species richness generally enhances ecosystem stability.
2

Species richness is highest in the tropics and generally decreases towards the poles.

Who first described the species-area relationship?

Charles Darwin
Alexander von Humboldt
Robert May
Paul Ehrlich
2

Alexander von Humboldt observed that species richness increases with increasing explored area, up to a limit.

Which of the following statements about endemic species is correct?

They are found worldwide.
They are restricted to a specific region.
They are found only in aquatic ecosystems.
They are always keystone species.
2

Endemic species are naturally restricted to a particular geographical region and are not found elsewhere.

Which of the following is an ethical reason for biodiversity conservation?

Economic benefits
Maintaining ecosystem balance
Every species has an intrinsic right to exist.
Oxygen production
3

The ethical argument for biodiversity conservation is that every species has an intrinsic value and an equal right to live, regardless of its usefulness to humans.

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