Tag: evs

Questions Related to evs

The term alpha diversity refers to

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

  1. Genetic diversity

  2. Community and ecosystem diversity

  3. Species diversity

  4. Diversity among the plants

Show answer
Correct Option: B
Explanation:
Alpha diversity, present within community diversity is a species diversity in a given community or habitat and is dependent upon species richness and evenness. There is a lot of competition, adjustments and interrelationships amongst members of the same community
So, the correct answer is 'Community and ecosystem diversity'

How does the level of biodiversity change as an individual moves from the north pole to the equator? 

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

  1. The biodiversity increases and then decreases.

  2. The biodiversity decreases and then increases.

  3. The biodiversity increases.

  4. The biodiversity does not change significantly.

  5. The biodiversity rapidly decreases.

Show answer
Correct Option: C
Explanation:

Biodiversity increases as one moves from North pole towards the equator. The North pole has an extremely cold climate that requires specialized adaptations for organisms to dwell, moreover resources are few.

As we move towards the equator natural resources in the form of precipitation, producers and a climate that is conducive to support a variety of flora and fauna increases and hence diversity increases.
So, the correct answer is 'The biodiversity increases.'

Which is accepted by researchers as a level of biodiversity?

I.   Species biodiversity
II.  Genetic biodiversity 
III. Ecosystem biodiversity 

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

  1. I only

  2. II onIy

  3. I and II only

  4. II and III only

  5. I, II and III

Show answer
Correct Option: E
Explanation:

  • Researchers have accepted three levels of biodiversity, namely genetic biodiversity, species biodiversity, and ecosystem biodiversity. All three levels are interrelated.
  • Genetic diversity includes variety at the level of genes. It is measured at various levels like population, species, community, and biome.
  • Species diversity includes variety in the species. It is the easiest method of studying diversity. Each species has a particular role in the ecosystem.
  • Ecosystem diversity includes diversity that deals with species distribution, community patterns, the role of key species and species interactions.
     
Thus, the correct answer is option E.

India became a party to convention on biological diversity in the year

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

  1. 1994

  2. 1993

  3. 1992

  4. 1988

Show answer
Correct Option: A
Explanation:

The Earth's Summit was held at Rio de Janeiro in Brazil in 1992. Earth summit at Rio, Brazil, promoted 'Convention on Biological Diversity' (CBD), which was signed by 152 nations. Its recommendations came into effect on 29$^{th}$ Dec, 1993. India became a party to this 'Convention on Biological Diversity' in May 1994.

Assertion : Alpha diversity is said to be higher if the dissimilarity between local pool species.

Reason : Alpha diversity is a measure of diversity between the communities in a local area.

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

  1. Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion

  2. Both the Assertion and the Reason are true but the Reason is not a correct explanation of the Assertion.

  3. The Assertion is true but the Reason is false.

  4. Both the Assertion and Reason are true.

  5. The Assertion is false but Reason is true.

Show answer
Correct Option: D
Explanation:

A local pool species includes all the available species in a given area. The species diversity in a local community is called alpha diversity. It is said to be higher if there is a dissimilarity between local pool species. This diversity is influenced by the interaction between the biotic and abiotic factors. It also depends on immigration. Thus the correct answer is option D.

Assertion : Diversity observed in the entire geographical area is called as gamma diversity.

Reason : Biodiversity decreases from high altitude to low altitude.

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

  1. Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.

  2. Both the Assertion and the Reason are true but the Reason is not a correct explanation of the Assertion.

  3. The Assertion is true but the Reason is false

  4. Both the Assertion and Reason are false.

  5. The Assertion is false but Reason is true.

Show answer
Correct Option: C
Explanation:

Community and ecosystem diversity is of three types- alpha, beta and gamma. 

Alpha diversity is the species diversity in a given community or habitat, alpha diversity is dependent upon species richness and evenness or equitability. 
Beta diversity is biodiversity, which appears in a range of communities due to the replacement of species with the change in community or habitat due to the presence of different micro-habitats, niches and difference in environment conditions. 
Gamma diversity is diversity present in ranges of communities as represented by the diversity of habitats or ecosystems over a total landscape or geographical area. 
Biodiversity is not uniform on the Earth. It varies with the change in latitude or altitude. 
Biodiversity increase, when we move from high to low latitude (i.e., from the poles to the equator)
Thus, the correct answer is option C.

Reason for diversity in living beings is due to __________________.

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

  1. Short term evolutionary changes

  2. Long term evolutionary changes

  3. Mutations

  4. Gradual change

Show answer
Correct Option: B

Convention on Biodiversity came into force on

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

  1. 29 Dec, 1993

  2. 6 June, 1992

  3. 3 October, 1994

  4. 4 October, 1993

Show answer
Correct Option: A
Explanation:

The Earth Summit of Rio de Janeiro, also known as the United Nations Conference on Environment and Development (UNCED), was held in Rio de Janeiro from 3 to 14 June 1992. It resulted into the Convention on Biodiversity, a multilateral treaty, which entered into force on December 29, 1993. Three major goals were addressed in this convention which included: conservation of biodiversity; sustainable use of its components; and the fair and equitable sharing of benefits arising from the genetic resources. 

So, the correct answer is '29 Dec, 1993'.

Diversity of habitats over the total geographical area is

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

  1. Alpha diversity

  2. Beta diversity

  3. Gamma diversity

  4. Delta diversity

  5. Omega diversity

Show answer
Correct Option: C
Explanation:

A) The diversity of organisms sharing the same habitat is known as alpha diversity.

B) The rate of replacement of species along a gradient of habitats is known as beta diversity. 
C) The diversity of habitats over the total landscape or geographical area is known as gamma diversity.
D) Delta diversity includes the differentiation of diversity over wide geographic areas.
So, the correct answer is 'Gamma diversity'.

Percentage of angiosperms of all the threatened species is

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

  1. 51%

  2. 42%

  3. 28%

  4. 18%

Show answer
Correct Option: A
Explanation:

IUCN is the authority on threatened species, and it treats threatened species as a group of three categories, depending on the degree relative to which they are threatened. Those categories are Vulnerable species; Endangered species and Critically endangered species. As per the Red list of 2000, there are 11,096 threatened species. The percentage of angiosperms of all the threatened species is 51%.

So, the correct answer is '51%'.