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Biodiversity and its Conservation Test 11

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Biodiversity and its Conservation Test 11
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  • Question 1
    1 / -0

    Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

    Q. How many biodiversity hot-spots are identified globally ?

    Solution

    There are more than 30 biodiversity hot-spots in the world. India has 4 biodiversity hot-spots.

  • Question 2
    1 / -0

    Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

    Q. Name the National Aquatic Animal of India ?

    Solution

    River dolphin is India's national aquatic animal. To save dolphins from extinction, the Union government has declared them as the national aquatic animal.

  • Question 3
    1 / -0

    Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

    Q. Main cause of extinction of animals and plants is :

    Solution

    Due to habitat loss animals migrate and lose their favourable condition, food, temperature, water that makes it difficult to survive and become extinct.

  • Question 4
    1 / -0

    Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

    Q. Species at the high risk of extinction in the future is called :

    Solution

    The species of an organism lasting with the change in suitable condition of survival with the time. Such species are called critically endangered.

  • Question 5
    1 / -0

    Pollution, climate changes, over-exploitation by humans etc. are responsible for changes in the ecosystem. Change in an ecosystem is responsible for depletion in biodiversity which directly or indirectly affects human beings and their surroundings. So it is important to conserve biodiversity. There are various methods like in-situ conservation, ex situ conservation by which we can conserve our biodiversity.

    Q. Protected areas are example of

    Solution

    Conservation of plants and species within the suitable boundary of natural surroundings.

  • Question 6
    1 / -0

    India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

    Q. Which among the following represents diversity at ecosystem level ?

    Solution

    Diversity of plants and animals in the ecosystem is called ecological diversity.

  • Question 7
    1 / -0

    India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

    Q. When does the group represent minimum species diversity among vertebrates ?

    Solution

    Among the vertebrates, minimum diversity is represented by amphibians and followed by reptiles, birds and mammals.

  • Question 8
    1 / -0

    India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

    Q. Which of the following taxon shows maximum species diversity ?

    Solution

    Beatles show maximum diversity in species as they represent the largest order of insects.

  • Question 9
    1 / -0

    India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

    Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :

    Assertion (A) : Tropics have more biodiversity.

    Reason (R) : Climate of the tropical region is more seasonal.

    Solution

    Tropics have more biodiversity due to warm temperature and high humidity.

  • Question 10
    1 / -0

    India is divided into 10 biogeographical regions. Varying physical conditions and species grouping India has rich species diversity. Tropics are a rich centre of biodiversity. Warm temperature, high humidity in tropical areas provide favourable conditions throughout the year. Rich diversity is important for stability, productivity for ecosystems.

    Q. What is the approximate ratio of animals and plant species in our country ?

    Solution

    Ratio of plants and species in India is 2 : 1.

  • Question 11
    1 / -0

    Read the following text and answer the following question on the basis of the same:

    Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

    Q. Identify a cause of biodiversity loss that is not included in the evil quartet?

    Solution

    Evil quartet, i.e., four major causes of biodiversity loss are habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction.

  • Question 12
    1 / -0

    Read the following text and answer the following question on the basis of the same:

    Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

    Assertion : Pollution reduces species biodiversity.

    Reason : Spillover of oil in the sea causes the death of several marine animals.

    Solution

    Spillover of oil in sea causes death of several marine animals and this pollution reduces species biodiversity.

  • Question 13
    1 / -0

    Read the following text and answer the following question on the basis of the same:

    Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

    Q. The species that have become extinct due to over exploitation is/are :

    Solution

    Steller's sea cow has become extinct in the last 500 years due to overexploitation by humans.

  • Question 14
    1 / -0

    Read the following text and answer the following question on the basis of the same:

    Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

    Q. ___________is the first major cause of species extinction.

    Solution

    Habitat destruction is an important cause of known extinctions. As deforestation proceeds in tropical forests, this promises to become THE cause of mass extinctions caused by human activity.

    All species have specific food and habitat needs. The more specific these needs and localized the habitat, the greater the vulnerability of species to loss of habitat to agricultural land, livestock, roads and cities. In the future, the only species that survive are likely to be those whose habitats are highly protected, or whose habitat corresponds to the degraded state associated with human activity (human commensals).

  • Question 15
    1 / -0

    Read the following text and answer the following question on the basis of the same:

    Excessive exploitation of species, whether a plant or animal reduces the size of its population, so it becomes vulnerable to extinction. Such as Dodo and passenger pigeons have become extinct due to over exploitation by humans. Thus, the world is facing accelerated rates of species extinctions, largely due to human interference.

    Q. Factors which make species susceptible to extinction are:

    Solution

    Population traits which make species susceptible to extinction are: small population, higher status of trophic level and inability to switch over to alternate foods.

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