Tag: environmental conservation and biodiversity

Questions Related to environmental conservation and biodiversity

Which of the following is correctly matched?

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

  1. Stratification- Population

  2. Aerenchyma- Opuntia

  3. Age pyramid- Biome

  4. Parthenium- Threat to biodiversity

Show answer
Correct Option: D
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'.

Number of wild life is continuously decreasing.What is the main reason of this : -

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

  1. Predation

  2. Cutting down of forest

  3. Destruction of habitat

  4. Hunting

Show answer
Correct Option: C
Explanation:
Wildlife refers to all living organisms (terrestrial, aquatic and aerial) living in all possible natural habitats of their own, other than the cultivated plants and domesticated animals. Thus 'wildlife' does not exist only in jungles and are hunted down but wildlife includes even the migrating birds, turtles, coral reefs, microorganisms, insects, fishes, etc. Several hundred organisms are endangered or on the verge of extinction. The reasons are deforestation, pollution, killing, overexploitation etc. The most important among them is deforestation or destruction of their natural habitat because it will affect the species (flora and fauna) of the complete area and not only a few organisms. The natural habitat may be destroyed by man for his settlements, grazing grounds, agriculture, mining, industries, dam building, etc. As a consequence of this, the species must adapt to the changes, move elsewhere or may succumb to predation, starvation or disease, and eventually dies.

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

Wildlife population are decreasing due to _________

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

  1. Afforestation

  2. Loss of minerals

  3. Poaching

  4. Loss of sunlight

Show answer
Correct Option: C
Explanation:
  • Poaching has been defined as illegal hunting or capturing of wild animals, usually associated with land use rights. 
  • According to Encyclopædia Britannica, poaching was performed by impoverished peasants for subsistence purposes and a supplement for meagre diets.
  •  Hence, Wildlife population are decreasing due to Poaching.
  • So, the correct answer is 'Poaching'.

The extinction and disappearance of some species is because of the _____

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

  1. Destruction of habitats

  2. Planting of trees

  3. Preservation of forest

  4. Prevention of overgrazing

Show answer
Correct Option: A
Explanation:

The extinction and disappearance of some species from planet take place due to the destruction of their natural habitat, poaching and killing habits. Whereas, planting of more trees (afforestation), preservation of forests and prevention of overgrazing causes conservation of natural habitat thereby saving the species from extinction.

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

The main reason for extinction of species is

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

  1. Hunting

  2. Destruction of habitat

  3. Pollution

  4. None of the above

Show answer
Correct Option: B
Explanation:

Habitat destruction is the process in which the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction is the greatest contributor to the extinction of many species. This destruction is ongoing in both terrestrial and aquatic biomes, with approximately 80% of all extinctions being attributed to human caused habitat destruction. Terrestrially the destruction includes forests, deserts and grasslands, but the latter may account for the greatest losses due to the agricultural and urban conversion.

Which one of the following may be the reason for extinction of plant species due to human activities?

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

  1. Earthquakes

  2. Pollution

  3. Diseases

  4. Evolution

Show answer
Correct Option: B
Explanation:

Extinction is the end of an organism or of a group of organisms, normally a species. Humans cause extinction of a species through over harvesting, pollution, habitat destruction, invasion of invasive species, over hunting and other influences. Although, earthquakes and diseases are the results of human activities but it does not cause any extinction of plant species. 

Therefore, the correct answer is option B.

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.