Biodiversity & Environmental Issues Test

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Biodiversity & Environmental Issues Test - 11

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Weekly Quiz Competition

Question 1
1 / -0.25

What is the global species diversity according to Robert May?

A
7 million

B
70 million

C
2 million

D
20 million
Solution
Robert McCredie May is a theoretical ecologist and promoter of science.

He estimated that there are almost 7 million species globally.
Question 2
1 / -0.25

Of all the plant species recorded which class has the minimum number of species?

A
Angiosperms

B
Fungi

C
Lichens

D
Algae
Solution
The mutualistic relationship between a fungus and photosynthesizing algae is called lichens.

Of all the plant species recorded, lichens have the minimum number of species.

They are used in the food industry, making dyes and have medicinal use.
Question 3
1 / -0.25

Read the given statement and select the correct option.
Statement 1: Tropical rainforests are disappearing fastly from developing countries such as India.
Statement 2: No value is attached to these forests because these are poor in biodiversity

A
Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1

B
Both statements 1 and 2 are correct and statement 2 is not the correct explanation of statement 1

C
Statement 1 is correct and statement 2 is incorrect

D
Both statements 1 and 2 are incorrect

Solution

Tropical rainforests are disappearing fastly from India due to deforestation, habitat loss and fragmentation. These forests are of extreme value since they contain the maximum biodiversity.
Question 4
1 / -0.25

Oragnisation responsible for maintaining Red Data Book is

A
IUCN

B
WWF

C
CITES

D
IBWL

Solution

IUCN is International Union of Conservation of Nature and Natural Resources, which is now called world conservation Union (WCU). It has its headquarters at Morges, Switzerland. It maintains a Red Data Book or Red List which is a catalogue of taxa facing risk of extinction.
Question 5
1 / -0.25

Amazon rainforests are considered as 'lungs of the planet 'as they contribute______of the total oxygen in the earth 's atmosphere.

A
10%

B
15%

C
20%

D
30%

Solution

About 20% of the world oxygen is produced in the amazon rainforests. They are described as the 'lungs of the planet because they provide the assential world environmental service of continously recycling CO₂ into O₂ .
Question 6
1 / -0.25

Introduction of alien species into new area poses a threat to extinction of indigenous species due to

A
their high nutrient requirement

B
their symbiotic relationship

C
absence of their natural predators

D
more intraspecific competition

Solution

In the absence of their natural predators, exotic species flourish better and pose a threat to indigenous species.
Question 7
1 / -0.25

Genetic variations affect the production of the drug reserpine in the medicinal plant Rauwolfia vomitoria growing in different Himalayan ranges. What kind of diversity does it indicate?

A
Species diversity

B
Genetic diversity

C
Ecological diversity

D
None of these

Solution

Genetic diversity is the diversity in the numbers and types of genes as well as chromosomes present in different species and the variations in the genes and their alleles in the same species. The genetic variation in Rauwolfia vomitoria growing in different Himalayan range indicates genetic diversity. Another example is of presence of more than 50,000 genetically different strains of rice, and 1000 varieties of mango in India.
Question 8
1 / -0.25

Western ghats have a greater number of amphibian species than the Eastern ghats. What kind of diversity does it represent?

A
Species diversity

B
Genetic diversity

C
Ecological diversity

D
None of these

Solution

Species diversity is the variety in the number and richness of the species of a region. Western ghats have greater amphibian species diversity as compared to Eastern ghats. The number of the species per unit area is called species richness. Number of individuals of different species represent species evenness or species equitability.
Question 9
1 / -0.25

Keystone species deserve protection because these

A
are capable of surviving in harsh environmental conditions

B
indicate presence of certain minerals in the soil

C
have become rare due to overexploitation

D
play an important role in supporting other species

Solution

Keystone species are those which have significant and disproportionately large influence on the community structure and characteristics. It has often considerably low abundance and biomass as compared to dominant species. Removal of such species causes serious disruption in structure and function of community.
Question 10
1 / -0.25

Match column I with column II and select the correct option from the given codes.

A
A-(iv), B-(i), C-(iii), D-(ii), E-(iv)

B
A-(iii), B-(i), C-(v), D-(ii), E-(iv)

C
A-(iii), B-(i), C-(v), D-(iv), E-(ii)

D
A-(v), B-(i), C-(iii), D-(iv), E-(ii)

Solution

A. Beta diversity - Between community diversity
B. Rich biodiversity - Tropical areas
C. Gamma diversity - Diversity of whole geographical region
D. Extinct species - Dodo
E. Critically endangered species - Great Indian bustard

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Re-Attempt Weekly Quiz Competition

Biodiversity & Environmental Issues Test - 11

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Biodiversity & Environmental Issues Test - 11

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SHARING IS CARING

Question 1

7 million

70 million

2 million

20 million

Solution

Question 2

Angiosperms

Fungi

Lichens

Algae

Solution

Question 3

Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1

Both statements 1 and 2 are correct and statement 2 is not the correct explanation of statement 1

Statement 1 is correct and statement 2 is incorrect

Both statements 1 and 2 are incorrect

Solution

Question 4

IUCN

WWF

CITES

IBWL

Solution

Question 5

10%

15%

20%

30%

Solution

Question 6

their high nutrient requirement

their symbiotic relationship

absence of their natural predators

more intraspecific competition

Solution

Question 7

Species diversity

Genetic diversity

Ecological diversity

None of these

Solution

Question 8

Species diversity

Genetic diversity

Ecological diversity

None of these

Solution

Question 9

are capable of surviving in harsh environmental conditions

indicate presence of certain minerals in the soil

have become rare due to overexploitation

play an important role in supporting other species

Solution

Question 10

A-(iv), B-(i), C-(iii), D-(ii), E-(iv)

A-(iii), B-(i), C-(v), D-(ii), E-(iv)

A-(iii), B-(i), C-(v), D-(iv), E-(ii)

A-(v), B-(i), C-(iii), D-(iv), E-(ii)

Solution

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