Tag: biodiversity loss and need for conservation

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Questions Related to biodiversity loss and need for conservation

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

Susceptibility to extinction is due to

  1. Large body size

  2. Small population

  3. High trophic level

  4. All of the above
Reveal answer Fill a bubble to check yourself
D 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 and position at a higher trophic level favour extinction.

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

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

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

  1. <p>Centella</p>

  2. <p>Podophyllum</p>

  3. <p>Gloriosa</p>

  4. All of the above
Reveal answer Fill a bubble to check yourself
B 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. 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'.

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

Which is mainly responsible for extinction of wildlife?

  1. Hunting of flesh

  2. Destruction of habitats

  3. Pollution of air and water

  4. All the above
Reveal answer Fill a bubble to check yourself
B 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. 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'.

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

Habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for

  1. Population explosion

  2. Biodiversity loss

  3. Migration pollution

  4. Ecological succession
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biodiversity loss leads to the extinction of species. Factors such as habitat loss and fragmentation, over-exploitation, alien species invasion and co-extinction are causes for such losses. 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.
So, the correct answer is 'Biodiversity loss'.

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

Which of the following practices has caused maximum damage to the diversity of Indian forests?

  1. Selective harvesting

  2. Block cutting

  3. Taungya cultivation

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

Jhum cultivation, also known as the slash and burn agriculture, is the process of growing crops by first clearing the land of forests and burning them thereafter. It is also known as shifting agriculture. The burnt soil contains potash which helps in increasing the nutrient content of the soil. This process has led to the maximum damage to the Indian forests as they are cleared for this process.

So, the correct answer is 'Jhum cultivation'.

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

Most of the endangered species are victims of 

  1. Acid rain

  2. Competition with introduced species

  3. Habitat destruction

  4. Over-hunting
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Endangered species are prone to become extinct. 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 '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 a result of habitat destruction, poaching, climate change and lack of resource management?

  1. Decline in biodiversity

  2. Decline of selection pressure

  3. Decline in natural resources

  4. Increase of green-house effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Habitat destruction, poaching, climate change and lack of resource management have resulted in a decline in biodiversity by leading to the extinction of species. Other factors such as large body size, small population, and position at a higher trophic level also favor extinction of species. 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.

So, the correct answer is 'Decline in biodiversity'.

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

Which of the following is the most important cause of animals and plants being driven to extinction?

  1. Co-extinctions

  2. Over-exploitation

  3. Alien species invasion

  4. Habitat loss and fragmentation
Reveal answer Fill a bubble to check yourself
D 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, habitat loss, and fragmentation (a most important factor), small population and position at a higher trophic level favor extinction.

So, the correct answer is 'Habitat loss and fragmentation'.

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

A very small population of a species faces a greater threat of extinction than a larger population. Which of the following is suitable genetic explanation?

  1. Fewer individuals in a species impose extensive inbreeding among them.

  2. This limits the appearance of variations and puts the species at a disadvantage, if there are changes in the environment.

  3. Since, the individuals fail to cope up with the environmental changes, they may become extinct.

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

Smaller population faces more risk of extinction than larger population. Smaller population faces more random fluctuation, which may result in greater death rate than birth rate and that ultimately leads to their extinction. Moreover, in smaller population, more inbreeding occurs between the individuals of a population, that leads to decrease in population's potential by letting the expression of harmful mutations through heterozygosity. In smaller population, amount of accumulated variation is lesser than in larger population. Variation help in survival of population under changed environmental conditions.

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 among the following is mainly responsible for the extinction of wildlife? 

  1. Pollution of air and water

  2. Hunting for flesh

  3. Destruction of habitat

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

Wildlife is an asset for our environment. It needs to be protected to maintain an optimum biodiversity. Some of the reasons for extinction of wild life are:

Destruction of their natural habitats by environmental pollution, deforestation, soil erosion, overgrazing, increased urbanization, forest fires, and developmental works.
Over exploitation of the natural resource, that is pollution of air and water.
Indiscriminate hunting that is hunting for flesh and international trade in rare animals.
Therefore, the correct answer is option D.