Tag: evs

Questions Related to evs

Select the correct statement about biodiversity

evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

  1. large scale planting of Bt cotton has no adverse effect on biodiversity

  2. conservation of biodiversity is a fad pursued by developed countries

  3. desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rate animals

  4. Western Ghats have a very high degree of species richness and endemism

Show answer
Correct Option: D
Explanation:
Hotspot of biodiversity are the areas which have a high density of biodiversity or megadiversity which are the most threatened points. All over the world, 25 terrestrial hotspots have been identified for the conservation of biodiversity. Out of these 15 hotspots have the tropical forest, 5 acres and Mediterranean time zones and 9 hotspots are present in tropics. Out of 25 hotspots of the world tour found in India. These are the Western Ghats and the eastern Himalayas.
So, the correct option is 'The Western Ghats have a very high degree of species richness and endemism'

Biodiversity means variations present in the species of the flora of an area.

evs animal- the base of our life diversity in the living world environmental conservation and biodiversity biodiversity on earth and in india

  1. True

  2. False

  3. Nither

  4. Either

Show answer
Correct Option: B

Coal and petroleum are called fossil fuels.      

evs solar energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy solar power plant production of electricity from solar energy solar energy and its applications

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: A
Explanation:

Answer is A.

It is because they are actually fossils. They are made of dead and decay matter buried under the earth for many years. The dead and decaying matter under great amount of pressure and temperatures turn into fossils and they both are used as fuels so it is called fossil fuels.
The fossil fuels we use today are actually formed from plants and animals that existed hundreds of millions of years ago. The reason there is a lot of concern surrounding the expenditure of these resources is because most of what we use today from fossil fuels, such as oil and coal are being depleted much faster than they can be formed, so there is a limited amount available.
Hence, the statement is true.

The fossil fuels include:

evs solar energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy solar power plant production of electricity from solar energy solar energy and its applications

  1. Uranium

  2. Soil

  3. Natural gas

  4. Plants

Show answer
Correct Option: C
Explanation:

Fossil fuels are formed when plants and marine species are buried below ground and are subjected to immense pressure and temperature for thousands of years. Examples include coal, petroleum and natural gas.

'Broadly utilitarian' argument for the conservation of biodiversity does not include

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

  1. Bioprospecting

  2. Pollination

  3. Aesthetic value

  4. Climatic regulation

Show answer
Correct Option: A
Explanation:

Bioprospecting is the exploration of molecular, genetic and species level-diversity for gaining the products of economic importance. It comes under narrowly utilitarian category. 

Biodiversity loss occurs due to 
(i) habitat loss and fragmentation
(ii) co-extinction
(iii) over-exploitation
(iv) alien species invasion.

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

  1. (i) and (ii)

  2. (i), (ii) and (iii)

  3. (ii), (iii) and (iv)

  4. (i), (ii), (iii) and (iv)

Show answer
Correct Option: D
Explanation:

The world is facing accelerated rates of species extinction, largely due to human interference. There are four major causes collectively called as the evil quarter.

The narrowly utilitarian arguments for biodiversity conservation include which of the following from the given list?
(i) Industrial products like dyes, lubricants
(ii) Ecosystem services like photosynthesis
(iii) Pollinators layer of bees, birds and bats
(iv) Firewood, fibre and construction material 
(v) The aesthetic pleasure of walking through thick woods 
(vi) Products of medicinal importance
(vii) Watching spring flowers in full bloom

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

  1. (i), (ii), (v) and (vii)

  2. (ii), (iii), (v) and (vii)

  3. (i), (iv) and (vi)

  4. (iii), (v), (vi) and (vii)

Show answer
Correct Option: C
Explanation:
The narrowly utilitarian arguments for conserving biodiversity are
obvious; humans derive countless direct economic benefits from nature food (cereals, pulses, fruits), firewood, fibre, construction material,
industrial products (tannins, lubricants, dyes, resins, perfumes ) and
products of medicinal importance. More than 25 per cent of the drugs
currently sold in the market worldwide are derived from plants and 25,000
species of plants contribute to the traditional medicines used by native
peoples around the world. Nobody knows how many more medicinally
useful plants there are in tropical rain forests waiting to be explored.
With increasing resources put into ‘bioprospecting’ (exploring molecular,
genetic and species-level diversity for products of economic importance),
nations endowed with rich biodiversity can expect to reap enormous
benefits.
So the correct option is '(i), (iv) and (vi)'.

Rivet popper hypothesis was given by

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

  1. Paul Ehrlich

  2. Alexander von Humboldt

  3. David Tilman

  4. Robert May.

Show answer
Correct Option: A
Explanation:

It is a theory that entails about the conditions of ecosystem wherein a significant loss of a certain species affects the functions and diversity of an ecological community. This hypothesis was given by Paul Ehrlich who used an airplane to explain ecosystem and the passengers as the rivet in the ecosystem. If certain biological areas lose several important species it can lead to a total collapse of ecosystem functions, thus this hypothesis presupposed that communities consist of relatively specialized species with limited ability to compensate each other thereby the vanished of a certain species are important to the performance of the ecosystem. The rate of species loss affects the entire function of ecological unit.  Rivet hypothesis asserts that each species losses to an ecological unit can decrease ecosystem functions although the decrease is rather slow as more species are eliminated. In this depiction any loss of diversity is clearly noticeable. 

So the correct option is 'Paul Ehrlich'.

Which of the following is true about conservation and preservation?
I. Protects the ecosystem from destruction
II. Prevents the depletion of natural resources.
III. Maintains the population of endangered plants and animal species.

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

  1. I only

  2. I and II only

  3. II and III only

  4. I, II and III

Show answer
Correct Option: D
Explanation:
Conservation is the sustainable use and management of natural resources, both renewable and non-renewable. Preservation is the strict keeping aside of natural resources so as to prevent the use or contact of resources by humans or by human intervention. 
Conservation ensures that resources are not consumed faster than they can be replaced. It also ensures that  sufficient quantities are maintained for future generations to utilise. Thus, it is involved in preventing the depletion of natural resources. The main purpose of conservation and preservation is to protect the ecosystem from destruction due to increased use of or consumption of resources. Conservation is also carried out to protect plant and animal species from being extinct. It maintains the population of endangered species by protecting and restoring the habitats and maintaining the essential ecological processes and life-support systems. 
Thus, the correct answer is option D.

Rivet popper hypothesis was given by

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

  1. Paul Ehrlich

  2. Tansley

  3. E.P. Odum

  4. None of the above

Show answer
Correct Option: A
Explanation:

Rivet hypothesis was given by Paul Ehrlich. It states that loss of many species in an ecological unit decreases ecosystem functioning. 

So, the correct answer is 'Paul Ehrlich'