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Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

What is a keystone species?

  1. A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival.

  2. A common species that has plenty of biomass, yet has a fairly low impact on the community's organization.

  3. A rare species that has minimal impact on the biomass and on other species in the community.

  4. A dominant species that constitutes a large proportion of the biomass and which affects many other species.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A keystone species is often a dominant predator whose removal allows a prey population to explode and often decreases overall diversity. Other kinds of keystone species are those, such as coral or beavers, that significantly alter the habitat around them and thus affect large numbers of other organisms.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

What shall be the effect of destruction of wildlife?

  1. Wild gene of disease resistance will not be obtained

  2. Soil erosion

  3. Floods and saline lake

  4. Greenhouse effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Destruction of wildlife will cause a drastic effect in an ecosystem. One of them will be wild gene of disease resistance will not be obtained as the gene pool of the particular area will be disturbed. There will no major effect in soil erosion, floods or greenhouse effect which is caused by other factors like deforestation and greenhouse gases respectively. 

Therefore, the correct answer is option A.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

What are the control methods that are to be adopted to restore balance in the ecosystems?

  1. Rain water harvesting for conservation and management of water.

  2. Conservation of ocean resources and preservation of marine life.

  3. Public awareness programmes concerning conservation of wildlife.

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

We know that the level of the ground is decreasing day by day due to its excessive use. As a result, the world is facing serious water issues. Apart from this, oceans form a resource for the development of electricity from water and form a habitat for a vast variety of marine organisms. Marine organisms form a major part of biodiversity fauna. All these are natural resources necessary to maintain the balance of the ecosystem.

So, option D "All of these"is the correct answer.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Wildlife refers to

  1. Any living organism kept in cage

  2. Any living organism present in sanctuary

  3. Any plant species growing in garden

  4. Any living organism in its natural habitat
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Wildlife refers to non-domesticated animal species that lives in natural habitat, but has come to include all plants, fungi, and other organisms that grow or live wild in an area without being introduced by humans.
Thus, the correct answer is option D.
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

The first plants to reappear in a badly burned forest area will most probably be

  1. Liverworts

  2. Ferns

  3. Grasses

  4. Mosses
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The ferns have two stages in their life cycle spore-bearing stage and sexually reproducing stage. Spore has a thick spore wall and is resistant to high temperatures and other environmental changes. The first plants to reappear in a badly burned forest area will most probably be ferns because its spores are resistant to fire.
So, the correct answer is 'Ferns'
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Which one of the following is not a conservation category of wildlife?

  1. Vulnerable

  2. Endangered

  3. Endemic

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Vulnerable species are those that have been categorized by the International Union for Conservation of Nature as likely to become endangered unless the conditions harming their survival and reproduction are improved.
Endangered species are those that are at the risk of extinction.
Endemic species are those that exist only in one particular geographic region.
Thus the correct answer is option C.
Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

A biosphere reserve conserves and preserves

  1. Wild animals

  2. Land

  3. Natural vegetation

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

An area which is conserved to protect the biodiversity and culture of that area is known as biosphere reserve. A biosphere reserve is consisted of many protected areas like sanctuaries, national parks, lakes, lands mountains etc. 

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Why should we conserve biodiversity?

  1. We should preserve the biodiversity we have inherited

  2. A loss of diversity may lead to a loss of ecological stability

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biodiversity is the variety of different types of life found on the Earth and the variations within species. It is a measure of the variety of organisms present in different ecosystems. we must preserve it as we have inherited it and maintain the ecological stability.

Multiple choice evs earth - our home need to conserve biodiversity protecting our environment rules are for everyone

Extinction of biodiversity is caused by the habitat degradation, fragmentation, over-harvesting and introduction of new species, described as

  1. Evil quartet

  2. Four horsemen

  3. Both A and B

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

Evil quartet or four horsemen of the ecological apocalypse explains the four main human-induced causes of extinction which were habitat degradation, fragmentation, the introduction of exotic species and over-harvesting. Thus, the correct answer is option C.