Environmental Studies · Biology

Biodiversity and Conservation

2,388 Questions

Biodiversity and conservation questions address threats to ecosystems, climate change impacts, and habitat loss. These topics are essential for environmental science sections in major competitive exams. Practicing these questions clarifies concepts regarding species extinction and ecological management.

Habitat loss consequencesClimate change impactsEcosystem degradation causesDesert biodiversity threatsForest diversity threatsResource extraction effects

Biodiversity and Conservation Questions

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Percentage of angiosperms of all the threatened species is

  1. 51%

  2. 42%

  3. 28%

  4. 18%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IUCN is the authority on threatened species, and it treats threatened species as a group of three categories, depending on the degree relative to which they are threatened. Those categories are Vulnerable species; Endangered species and Critically endangered species. As per the Red list of 2000, there are 11,096 threatened species. The percentage of angiosperms of all the threatened species is 51%.

So, the correct answer is '51%'.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Maximum biodiversity is found in

  1. Tropical rain forests

  2. Temperate rain forests

  3. Mangrove vegetation

  4. Tundra
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Maximum biodiversity is found in Tropical rain forests. One of the reasons is that tropical environments, unlike temperate ones, are less seasonal, relatively more constant and predictable. Such constant environments promote niche specialization and lead to greater species diversity. Examples:-
A) A forest in a tropical region like Equador has up to 10 times as many species of vascular plants as a forest of equal area in a temperate region like the Midwest of the USA. 
B) The largely tropical Amazonian rain forest in South America has the greatest biodiversity on earth- it is home to more than 40,000 species of plants, 3,000 of fishes, 1,300 of birds, 427 of mammals, 427 of amphibians, 378 of reptiles and of more than 1,25,000 invertebrates.
So, the correct answer is 'Tropical rain forests'.
Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Given below are a few statements related to biodiversity. Pick those that correctly describe the concept of biodiversity.
(i) Biodiversity refers to the different species of flora and fauna present in an area.
(ii) Biodiversity refers to only the flora of a given area.
(iii) Biodiversity is greater in a forest.
(iv) Biodiversity refers to the total number of individuals of a particular species living in an area.

  1. (i) and (ii)

  2. (ii) and (iv)

  3. (i) and (iii)

  4. (ii) and (iii)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biodiversity refers to the different species of flora and fauna present in an area. The forest has a wide variety of flora and fauna which flourishes widely in the given area and are a rich source of biodiversity. Biodiversity is not concerned with a particular species .

So, the correct answer is option C.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Biodiversity of a geographical region represents

  1. endangered species found in the region

  2. the diversity in the organisms living in the region

  3. genetic diversity in the dominant species of the region

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biodiversity of a geographical region represents the diversity in the organisms living in the region. 

So, the correct option is 'Option B'.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Biodiversity of a geographic region represents

  1. Genetic diversity present in the dominant species of the region

  2. Species evdemism to the region

  3. Endangered species found in the region

  4. Diversity in organisms living in the region
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biodiversity refers to the variety and variability among living organism and the ecological complexes in which they occur. Biodiversity of a particular region replaces the diversity in organism living in that region all the flora fauna different species that are present in that particular region.

So, the correct option is 'Diversity in organisms living in the region'.

Multiple choice evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

Select the correct statement about biodiversity

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

  2. conservation of biodiversity is a fad pursued by developed countries

  3. desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rate animals

  4. Western Ghats have a very high degree of species richness and endemism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Hotspot of biodiversity are the areas which have a high density of biodiversity or megadiversity which are the most threatened points. All over the world, 25 terrestrial hotspots have been identified for the conservation of biodiversity. Out of these 15 hotspots have the tropical forest, 5 acres and Mediterranean time zones and 9 hotspots are present in tropics. Out of 25 hotspots of the world tour found in India. These are the Western Ghats and the eastern Himalayas.
So, the correct option is 'The Western Ghats have a very high degree of species richness and endemism'
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Biodiversity loss occurs due to 
(i) habitat loss and fragmentation
(ii) co-extinction
(iii) over-exploitation
(iv) alien species invasion.

  1. (i) and (ii)

  2. (i), (ii) and (iii)

  3. (ii), (iii) and (iv)

  4. (i), (ii), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The world is facing accelerated rates of species extinction, largely due to human interference. There are four major causes collectively called as the evil quarter.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Evil quartet is related to

  1. Loss of biodiversity

  2. Loss of alien species

  3. Loss of standing crop

  4. Loss of climax community
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Jarod Diamond in 1984 listed four principal mechanisms for the loss of biodiversity. It was known as the 'Evil quartet'. It was also known as ‘four horsemen of the ecological apocalypse. The four mechanisms were:-
a) overhunting (or overexploitation),
b) introduced species,
c) habitat destruction and
d) chains of linked extinctions (trophic cascades, or co-extinctions).
So, the correct answer is 'Loss of biodiversity'.
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Extinction is caused by ............

  1. Deforestation

  2. Over-exploitation of animals

  3. The destruction of aquatic habitats by pollution

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Extinction means a group of species, family or larger group that have no living member. The extinction can be caused due to various factors such as deforestation (cutting down of trees), Over exploitation of organisms for human good, or by the destruction of the natural habitat or organism. 

So, the correct answer is 'All of the above'.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

What shall be the effect of destruction of wildlife?

  1. Wild gene of disease resistance will not be obtained

  2. Soil erosion

  3. Floods and saline lake

  4. Greenhouse effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Destruction of wildlife will cause a drastic effect in an ecosystem. One of them will be wild gene of disease resistance will not be obtained as the gene pool of the particular area will be disturbed. There will no major effect in soil erosion, floods or greenhouse effect which is caused by other factors like deforestation and greenhouse gases respectively. 

Therefore, the correct answer is option A.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

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

  1. Evil quartet

  2. Four horsemen

  3. Both A and B

  4. Succession
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Which one of the following strongly threatens biodiversity?

  1. Destruction of mutual habitats and vegetation and shifting cultivation

  2. Inaccessible habitats in the Himalayas

  3. Fragile ecosystems such as mangroves and wetlands

  4. Creation of biosphere reserves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Loss of habitat or destruction which is a result of increasing human population in the region has put heavy pressure on the food requirements.

So, the correct option is 'Destruction of mutual habitats and vegetation and shifting cultivation'.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification five kingdoms of living organisms biodiversity and need of classification biodiversity and classification

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

  1. Species diversity

  2. Genetic diversity

  3. Ecological diversity

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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.

Multiple choice biology adapting to a habit extreme adaptations adaptive features adaptations of organisms

Which of the following organisms are badly affected when large habitats are broken up into small fragment due to various human activities?

  1. Mammals requiring small territories

  2. Planktons showing diapause

  3. Animals with migratory habits

  4. Birds requiring small territories
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are various causes of biodiversity losses. One of the reason is habitat loss and fragmentation. When large habitats are broken up into small fragments due to various human activities, mammals and birds requiring large territories and animals with migratory habits are badly affected. This results in the decline in their population.

Thus, the correct answer is 'Animals with migratory habits.'

Multiple choice biology main natural resources classification of threatened species red data book conservation of wildlife

The death of the last individual of a species is called as

  1. Extinction

  2. Rare

  3. Endangered

  4. Threatened
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The species that no more exist on earth are known as extinct species Eg. dinosaurs. The species which are on the verge of extinction and which are required to be protected and conserved are known as endangered or threatened species, Eg. tiger. A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. Thus, the correct answer is option A.