Tag: biodiversity, classification and conservation

Questions Related to biodiversity, classification and conservation

Which of the following is the main reason for extinction of animals?

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

  1. Predation

  2. Pollution

  3. Destruction of habitat

  4. Felling of trees

Show answer
Correct Option: C
Explanation:

Destruction of habitat is the process in which natural habitat is rendered unable to support the species that lived in it. Increasing urbanization and industrialization has resulted in encroachment of forest areas leading to destruction of habitat. As a result, the natural flora and fauna have been endangered and some have become extinct. Thus the correct answer is option C.

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? 

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

  1. Melting ice due to global warming

  2. Organic pollutants

  3. Habitat destruction

  4. Human encroachment

  5. Habitat fragmentation

Show answer
Correct Option: A
Explanation:

Polar bears are found in arctic region where the ice caps are present and temperature is quite low. Hence, melting ice due to global warming is the greatest threat to the biodiversity of polar bears.

Anthropogenic extinction means the extinction of species from surface of Earth, that is due to

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

  1. Change in season

  2. Effects of meteors

  3. Human activities

  4. None of the above

Show answer
Correct Option: C
Explanation:
Anthropogenic extinction means the extinction of species from surface of Earth, that is due to human activities.
The Holocene extinction, otherwise referred to as the Sixth extinction or Anthropocene extinction, is a name for the ongoing extinction event of species during the present Holocene epoch (since around 10,000 BCE) mainly due to human activity.

Which of the following is responsible for the extinction of wildlife?

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

  1. Hunting

  2. Destruction of habitats

  3. Pollution of air and water

  4. All of the above

Show answer
Correct Option: D
Explanation:

The important causes of biodiversity losses or species extinctions, that the world is facing now, are largely due to human activities. There are four major causes -
(i) Habitat loss and fragmentation (includes deforestation and pollution).
(ii) Over-exploitation (includes hunting, fishing and other such activities).
(iii) Alien species invasions.
(iv) Co-extinctions.

Thus, the correct answer is option D.

The factor that destroys plant biodiversity is

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

  1. Biosphere reserves

  2. Vulnerable ecosystems

  3. Inaccessibility of habitats

  4. Destruction of habitats

Show answer
Correct Option: D
Explanation:

The factor that destroys plant biodiversity is destruction of habitats, wildlife species get extinct because of destruction of forest by deforestation.

So, the correct answer is 'Destruction of habitats'

Extinction of numerous wild animals is due to

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

  1. Hunting

  2. Deforestation

  3. Overcrowding

  4. Scarcity of food

Show answer
Correct Option: B
Explanation:

Deforestation refers to destruction of forest by extensive cutting of trees, since wild animals live in forests, they lose their habitat which leads to extinction of species

So, the correct answer is 'Deforestation'

Bald Eagle had been at high risk of extinction due to its

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

  1. Large size

  2. Low reproductive potential

  3. High trophic level

  4. Change in migratory route

Show answer
Correct Option: C
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, and position at a higher trophic level favour extinction.
So, the correct answer is 'High trophic level'.

Susceptibility to extinction is due to

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

  1. Large body size

  2. Small population

  3. High trophic level

  4. All of the above

Show answer
Correct Option: D
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 and position at a higher trophic level favour extinction.

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

Plant species on verge of extinction due to over-exploitation is

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

  1. Centella

  2. Podophyllum

  3. Gloriosa

  4. All of the above

Show answer
Correct Option: B
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. A decrease in the species diversity progresses to extinction if left uncontrolled. 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 over-exploitation, large body size, small population, massive habitat loss and position at a higher trophic level favor extinction. A plant podophyllum is at the verge of extinction due to over-exploitation. So, the correct answer is 'Podophyllum'.

Which is mainly responsible for extinction of wildlife?

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

  1. Hunting of flesh

  2. Destruction of habitats

  3. Pollution of air and water

  4. All the above

Show answer
Correct Option: B
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. As forests are the main habitat for the wild animals, their loss favors the extinction of the same.

So, the correct answer is 'Destruction of habitats'.