Biodiversity and Conservation Test

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Biodiversity and Conservation Test - 44

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Weekly Quiz Competition

Question 1
1 / -0

All of the following can affect biodiversity, except

A
Habitat fragmentation

B
Biological magnification

C
Contour ploughing

D
Introduction of non-native species

E
Desertification of land

Solution

A. Habitat fragmentation is the process of habitat loss in which larger habitats get divided into many small and fragmented habitats. This destroys the natural home of many species and affect biodiversity.
B. Biological magnification is the accumulation and increase in concentration of a toxic chemical, at successive trophic levels.
C. Contour ploughing is the ploughing of land according to its contour or slope and this helps in preventing soil erosion.
D. Introduction of non-native species can become a threat to biodiversity as they compete with the native species for resources. For example, Water hyacinth which multiplies at a very high rate.
E. Desertification of land has lead to destruction of soil microflora and natural habitat of many species of plants and animals.
Hence, contour ploughing won't affect biodiversity.
So, the correct answer is 'Contour ploughing'.
Question 2
1 / -0

Beta $$(\beta)$$ diversity refers to diversity

A
Within a community

B
Between communities

C
Between two eco zones

D
Within a population

Solution

Beta ($$\beta$$) diversity refers to diversity between communities. It is the ratio between regional ($$\gamma$$) and local ($$\alpha$$) species diversity. The term was introduced by R. H. Whittaker. It can be measured in the terms of changes in diversity of species from one environment to another.
So, the correct answer is option B.
Question 3
1 / -0

Threatened and endangered species are being protected in which of the following ways?
I. Captive breeding
II. Wildlife refuges
III. Laws and regulations

A
I and III only

B
II only

C
III only

D
II and III only

E
I, II and III

Solution

I. Captive breeding is the protection of plants and animal species in a controlled environment. For example, botanical gardens, wildlife reserves etc.
II. Wildlife refuges are the name or designation given to certain protected areas of plants and animal species.
III. Laws and regulations are the rules that are implemented to protect species of plants and animals.
Hence, threatened and endangered species are being protected in captive breeding and laws are made to protect them.
So, the correct answer is 'I and III only'.
Question 4
1 / -0

Polar bears are just one species whose biodiversity has been affected by human activities. Which of these is the greatest threat to the polar bears?

A
Melting of glaciers

B
Organic pollutants

C
Increased population

D
Human settlement

E
Habitat fragmentation

Solution

Polar bears are found in the Arctic region where the ice caps are present and temperature is quite low. Hence, the melting of ice due to global warming is the greatest threat to the biodiversity of polar bears. This results in the destruction of their residence site.
Thus, the correct answer is option A.
Question 5
1 / -0

Biodiversity is being conserved in a variety of ways. Which of these is a way in which biodiversity is currently being conserved?
I. Preserving habitats
II. Introducing non-native species
III. Protecting populations

A
I only

B
II only

C
II and III only

D
I and III only

E
I, II and III

Solution

I. Preserving habitats is the protection of natural habitats of species.
II. Introducing non-native species can be harmful as they compete with the native species for resources.
III. Protecting populations is not the protection of biodiversity. Instead, it includes the protection of resources essential for the survival of the population.
Hence, biodiversity is being conserved by preserving habitats. So, the correct answer is 'I only'.
Question 6
1 / -0

Given below is the representation of the extent of global diversity of vertebrates. What groups does the portions represent?

A
A - Mammals, B - Birds, C - Fishes, D - Amphibians, E - Reptiles

B
A - Fishes, B - Mammals, C - Birds, D - Reptiles, E - Amphibians

C
A - Birds, B - Reptiles, C - Fishes, D - Mammals, E - Amphibians

D
A - Fishes, B - Amphibians, C - Mammals, D - Birds, E - Reptiles

Solution

The change in the gene pool due to the process of mutation and recombination may lead to a change in the diverse range of vertebrates. The external factors like temperature, food availability may bring certain adaptational changes which may also contribute to global diversity. According to the given pie chart, fishes has maximum global diversity followed by mammals, birds reptiles and amphibians.
So, the correct answer is option B.
Question 7
1 / -0

Which is accepted by researchers as a level of biodiversity?
I. Species biodiversity
II. Genetic biodiversity
III. Ecosystem biodiversity

A
I only

B
II onIy

C
I and II only

D
II and III only

E
I, II and III
Solution
- Researchers have accepted three levels of biodiversity, namely genetic biodiversity, species biodiversity, and ecosystem biodiversity. All three levels are interrelated.
- Genetic diversity includes variety at the level of genes. It is measured at various levels like population, species, community, and biome.
- Species diversity includes variety in the species. It is the easiest method of studying diversity. Each species has a particular role in the ecosystem.
- Ecosystem diversity includes diversity that deals with species distribution, community patterns, the role of key species and species interactions.
Thus, the correct answer is option E.
Question 8
1 / -0

Kokkarebellur Bird Sanctuary is noticed in

A
Mandya

B
Mysore

C
Chamarajnagar

D
Hassan
Solution
- Kokkarebellur Bird Sanctuary is located in Mandya district which is 80km away from Banglore.
- Storks and the pelicans are the major inhabitants of the bird sanctuary located here in the village.
- It has the inhabitants of the largest flora of the birds. So, the correct answer is option A.
Question 9
1 / -0

Select the correct statement about biodiversity.

A
The desert area of Rajasthan and Gujarat have a very high level of desert animals.

B
Large scale planting of Bt cotton has no adverse $$1$$ effect on biodiversity.

C
Western Ghats have a very high degree of species richness and endemism.

D
Conservation of biodiversity is just a fad pursued by the developed countries.
Solution
A.Correct option

B.Explanation for correct option:
- Western ghats are one of the hotspots in India and lie parallel to the western coast of the Indian Peninsula for about 1600 km in Maharashtra, Karnataka, Tamil Nadu and Kerala.
- There is a high degree of species richness and endemism of flowering, non-flowering plants, reptiles, amphibians, insects, birds, fishes species.
- Thus, Western ghats have very high endemism and are extremely rich in species biodiversity.
Question 10
1 / -0

Extinction of biodiversity is caused by the habitat degradation, fragmentation, over-harvesting and introduction of new species, described as

A
Evil quartet

B
Four horsemen

C
Both A and B

D
Succession

Solution

Evil quartet or four horsemen of the ecological apocalypse explains the four main human-induced causes of extinction which were habitat degradation, fragmentation, the introduction of exotic species and over-harvesting. Thus, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Biodiversity and Conservation Test - 44

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Biodiversity and Conservation Test - 44

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Question 1

Habitat fragmentation

Biological magnification

Contour ploughing

Introduction of non-native species

Desertification of land

Solution

Question 2

Within a community

Between communities

Between two eco zones

Within a population

Solution

Question 3

I and III only

II only

III only

II and III only

I, II and III

Solution

Question 4

Melting of glaciers

Organic pollutants

Increased population

Human settlement

Habitat fragmentation

Solution

Question 5

I only

II only

II and III only

I and III only

I, II and III

Solution

Question 6

A - Mammals, B - Birds, C - Fishes, D - Amphibians, E - Reptiles

A - Fishes, B - Mammals, C - Birds, D - Reptiles, E - Amphibians

A - Birds, B - Reptiles, C - Fishes, D - Mammals, E - Amphibians

A - Fishes, B - Amphibians, C - Mammals, D - Birds, E - Reptiles

Solution

Question 7

I only

II onIy

I and II only

II and III only

I, II and III

Solution

Question 8

Mandya

Mysore

Chamarajnagar

Hassan

Solution

Question 9

The desert area of Rajasthan and Gujarat have a very high level of desert animals.

Large scale planting of Bt cotton has no adverse $$1$$ effect on biodiversity.

Western Ghats have a very high degree of species richness and endemism.

Conservation of biodiversity is just a fad pursued by the developed countries.

Solution

Question 10

Evil quartet

Four horsemen

Both A and B

Succession

Solution

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