Tag: biodiversity losses

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Questions Related to biodiversity losses

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

The impact of loss of biodiversity include

  1. decline in plant production

  2. lowered resistance to environmental perturbations

  3. increased variability in ecosystem processes like plant productivity, water use, pest and disease cycles

  4. all of these.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Loss of biodiversity includes decline in plant production, lowered resistance to environmental perturbations and increased variability in processes of ecosystem.

So, the correct option is 'all of these.'.

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

Which of these actions does not cause decrease in biodiversity?

  1. Pollution

  2. Forest fire

  3. Overgrazing

  4. Afforestation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Decrease or loss of biodiversity can be brought by pollution in environment and habitat, forest fires and loss of habitat and overgrazing. While afforestation or planting of forest trees cause conservation of natural habitat thus saving the biodiversity.

So, the correct answer is 'Afforestation'.

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

What factors lead to decline in biodiversity? 

  1. Acid rain

  2. Pollution

  3. Population

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

The major causes of biodiversity decline are land use changes, pollution, changes in atmospheric CO$ _2$ concentrations, changes in the nitrogen cycle and acid rain, climate alterations and the introduction of exotic species, all coincident to human population growth. The geometric rise in human population levels during the twentieth century is the fundamental cause of the loss of biodiversity. It exacerbates every other factor having an impact on rainforests. It has led to an unceasing search for more arable land for food production and livestock grazing, and for wood for fuel, construction, and energy. 

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

Which of the following is/are factors that pose a great threat to biodiversity?

  1. Habitat destruction

  2. Disturbance and introduction of alien species

  3. Man's interference with nature

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

Biodiversity refers to the variety of organisms in an ecosystem. However, the biodiversity of an ecosystem is lost when there is fragmentation of the habitat or invasion by any alien species. The interference of the man with the nature and exploitation of its resources can result in the loss of the biodiversity. 

Thus, the correct answer is option D. 

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

Which of the following type of animal is chiefly protected by man?

  1. Harmless animals

  2. Economically useful animals

  3. Extinct animals

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

Man makes special efforts to conserve the animals, which are likely to become extinct without special efforts of man to conserve biodiversity and animals are a part of biodiversity. 

Thus, the correct answer is option C

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

What is the major cause of diminishing wildlife number?

  1. Cannibalism

  2. Habitat destruction

  3. Falling of trees

  4. Paucity of drinking water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Habitat loss and fragmentation (habitat destruction) are the most important causes for driving animals and plants to extinction. 

The most dramatic examples of habitat loss come from tropical rainforests. Once covering more than 14 percent of the Earth's land surface, these rainforests now cover no more than 6 percent. They are being destroyed fast. Besides the total loss, the degradation of many habitats by pollution also threatens the survival of many species. When large habitats are broken up into small fragments due to various human activities, mammals and birds requiring large territories and certain animals with migratory habits are badly affected, leading to population declines.

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

What is mainly responsible for extinction of wildlife?

  1. Hunting for flesh

  2. Destruction of habitats

  3. Pollution of air and water

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

Hunting for flesh & skin, destruction of habitats by deforestation & polluted air & water leads to extinction of wildlife.

So, the correct answer is 'All the above'

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

Wildlife is destroyed most when

  1. There is lack of proper care

  2. Mass scale hunting for foreign trade

  3. Its natural habitat is destroyed

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

When there are no more individuals of a species (plant or animal) alive anywhere in the world, the species is said to be extinct. Extinction is also known as the process of dying out. The process is a completely natural part of evolution. But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as large body size, small population, massive habitat loss and position at a higher trophic level favor extinction

So, the correct answer is 'Its natural habitat is destroyed'

Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

One of the chief reasons among the following for the depletion in the number of species making it endangered is

  1. Greenhouse effect

  2. Habitat destruction

  3. Overhunting and poaching

  4. Competition and predation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Jarod Diamond in 1984 listed four chief 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 'Habitat destruction'.
Multiple choice zoology biodiversity, classification and conservation biodiversity losses biodiversity loss and need for conservation environmental conservation and biodiversity

Which of the following is correctly matched?

  1. Stratification- Population

  2. <p>Aerenchyma- Opuntia</p>

  3. Age pyramid- Biome

  4. <p>Parthenium- Threat to biodiversity</p>
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Parthenium or carrot grass is an alien species. When alien species are introduced unintentionally or deliberately for whatever purpose, some of them turn invasive and cause decline or extinction of indigenous species. Such species are also called exotic or introduced species. Thus, Parthenium is a threat to biodiversity as it competes with our local species for the limited resources. So, the correct answer is 'Parthenium- Threat to biodiversity'.