CBSE Class 12 Biology Biodiversity and Conservation MCQs Set B

Question. Identify the ecologist from the given hints.
(i) He carried out long-term ecosystem experiments using outdoor plots.
(ii) In his experiments he showed that “increased diversity contributed to higher productivity.
a) Ahmed Khan
b) David Tilman
c) Stanley Cohen
d) Ernest Chain

Answer : B

Question. The relation between species richness and area is described on a logarithmic scale by the equation_____ [where S = species richness, A = area, Z = slope of the line (regression coefficient), C= Y-intercept].
a) log S = log C – Z log A
b) log S = Z log A
c) log S = log C + Z log A
d) log S = log C

Answer : C

Question. World summit on sustainable development was held in
a) 2002
b) 1990
c) 1960
d) 1970.

Answer : C

Question. Which one of the following is not an in situ conservation method?
a) National parks
b) Wild life sanctuary
c) Biosphere reserves
d) Zoological parks

Answer : D

Question: What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
a) All are prone to over exploitation
b) All are phylogenic link species
c) All are ornamental plants
d) All are exclusively present in the Eastern Himalayas

Answer : A

Question. In your opinion, which is the most effective way to conserve the plant diversity of an area?
a) By tissue culture method
b) By creating biosphere reserve
c) By creating botanical garden
d) By developing seed bank

Answer : B

Question. Which of the following is the most important cause of animals and plants being driven to extinction?
a) Habitat loss and fragmentation
b) Co-extinctions
c) Over-exploitation
d) Alien species invasion

Answer : A

Question. The largest Tiger reserve in India is
a) Nagarhole
b) Valmiki
c) Nagarjunsagar-Srisailam
d) Periyar

Answer : C

Question. Alpha diversity is present
a) within community.
b) between community.
c) ranges of communities.
d) all of the above.

Answer : A

Question. Which endangered animal is the source of the world’s finest, lightest, warmest and most expensive wool – the shahtoosh?
a) Nilgai
b) Cheetal
c) Kashmiri goat
d) Chiru

Answer : D

Question. Decline in the population of indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be categorised as
a) co-extinction
b) habitat fragmentation
c) over exploitation
d) alien species invasion.

Answer : D

Question. Red list contains data or information of
a) all economically important plants
b) plants whose products are in international trade
c) threatened species
d) marine vertebrates only.

Answer : C

Question: What is common to Lantana, Eichhornia and African catfish?
a) All the species are neither threatened nor indigenous species of India.
b) All are mammals found in India.
c) All are key stone species
d) All are endangered species of India

Answer : A

Question. Which one of the following is not included under in situ conservation?
a) National park
b) Sanctuary
c) Botanical garden
d) Biosphere reserve

Answer : C

Question. Largest amount of fresh water is found in
a) lakes and streams
b) underground
c) polar ice and glaciers
d) rivers

Answer : C

Question. The Indian rhinoceros is a natural inhabitant of which one of the Indian states?
a) Uttarakhand
b) Uttar pradesh
c) Himachal Pradesh
d) Assam

Answer : D

Question. Alexander von Humboldt described for the first time
a) laws of limiting factor
b) species area relationships
c) population growth equation
d) ecological biodiversity

Answer : B

Question. Decline in the population of indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be categorised as
a) co-extinction
b) habitat fragmentation
c) over exploitation
d) alien species invasion.

Answer : D

Question. With respect to Eichhornia:
Statement X : It drains off oxygen from water and is seen growing in standing water.
Statement Y : It is an indigenous species of our country.
a) Only statement X is correct and Y is wrong.
b) Both statements X and Y are correct.
c) Only statement Y is correct and X is wrong.
d) Both statements X and Y are wrong.

Answer : A

Question. Which is referred to as ‘Lungs of the Planet Earth’?
a) Western Ghat
b) Lake Victoria
c) Greenland
d) Amazon rainforest

Answer : D

Question: Which of the following is not a cause for loss of biodiversity?
a) Keeping animals in zoological parks
b) Invasion by alien species
c) Destruction of habitat
d) Over-exploitation of natural resources

Answer : A

Question. One of the endangered species of Indian medicinal plants is that of
a) Ocimum
b) garlic
c) Nepenthes
d) Podophyllum.

Answer : D

Question. The Earth Summit held in Rio de Janeiro in 1992 was called
a) for immediate steps to discontinue use of CFCs that were damaging the ozone layer
b) to reduce CO₂ emissions and global warming
c) for conservation of biodiversity and sustainable utilization of its benefits
d) to assess threat posed to native species by invasive weed species.

Answer : D

Question. Pollen grains can be stored for several years in liquid nitrogen having a temperature of
a) –120°C
b) –80°C
c) –196°C
d) –160°C.

Answer : C

Question. Which one of the following is an example of ex-situ conservation?
a) Wildlife sanctuary
b) Seed bank
c) Sacred groves
d) National park

Answer : B

Question. Flamingoes breed in
a) Rann of Kutch
b) Chilka lake
c) Sambhar lake
d) Lake Mansarover

Answer : B

Question. Which of the following is not an ex-situ conservation?
a) Cryopreservation
b) Seed bank
c) Biosphere reserves
d) Botanical garden

Answer : C

Question. Which of the following is the most serious threat to biodiversity?
a) Competition from exotic species
b) Commercial harvesting
c) Habitat loss
d) Overexploitation

Answer : C

Question.Which type of living organisms given below are listed in Red Data Book”?
a) Rare species
b) Rare and endangered species
c) Endangered species
d) None of these

Answer : B

Question.One endangered species of Indian medicinal plants is that of
a) Podophyllum
b) Ocimum
c) Garlic
d) Nepenthes

Answer : A