CBSE Class 12 Biology Biodiversity and Conservation MCQs Set 03

Question. One of the chief reasons among the following for the depletion in the number of species making it endangered is
a) over-hunting and poaching
b) greenhouse effect
c) competition and predation
d) habitat destruction.

Answer : D

Question. The species confined to a particular region and not found elsewhere is termed as
a) endemic
b) rare
c) keystone
d) alien.

Answer : A

Question. Which one of the following is a pair of endangered species?
a) Garden lizard and Mexican poppy
b) Rhesus monkey and sal tree
c) Indian peacock and carrot grass
d) Hornbill and Indian aconite

Answer : D

Question. Genetic diversity in agricultural crops is threatened by
a) introduction of high yielding varieties.
b) intensive use of fertilizers.
c) extensive intercropping.
d) intensive use of biopesticides.

Answer : D

Question. The organisation which publishes the Red list of species is
a) ICFRE
b) IUCN
c) UNEP
d) WWF.

Answer : B

Question. From origin of life to its diversification on earth, there have occurred following number of episodes of mass extinction.
a) Two
b) Three
c) Four
d) Five

Answer : D

Question. Which one of the following is related to ex-situ conservation of threatened animals and plants?
a) Biodiversity hotspots
b) Amazon rainforest
c) Himalayan region
d) Wildlife safari parks

Answer : D

Question. MAB stands for
a) mammals and biosphere
b) mammals and biology programme
c) man and biology programme
d) man and biosphere programme.

Answer : D

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. The abundance of a species population, within its habitat, is called
a) relative density
b) regional density
c) absolute density
d) niche density.

Answer : D

Question. Occurrence of endemic species in South America and Australia is due to
a) these species has been extinct from other regions
b) continental separation
c) there is no terrestrial route to these places
d) retrogressive evolution.

Answer : B

Question. Choose the right one which denotes genetic diversity.
a) Chromosomes → Nucleotides → Genes → Individuals → Populations
b) Populations → Individuals → Chromosomes → Nucleotides → Genes
c) Genes → Nucleotides → Chromosomes → Individuals → Populations
d) Nucleotides → Genes → Chromosomes → Individuals → Populations

Answer : D

Question. Read the statements regarding a stable community and choose the correct option.
(i) Must be resistant to occasional disturbances.
(ii) Should show much variation in productivity from year to year.
(iii) Must be resistant to invasions by alien species.
a) (i) and (ii) are correct.
b) (i), (ii) and (iii) are correct.
c) (ii) and (iii) are correct.
d) (i) and (iii) are correct.

Answer : D

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 related to ex-situ conservation of threatened animal and plants?
a) Biodiversity hotspots
b) Amazon rainforest
c) Himalayan region
d) Wildlife safari parks

Answer : D

Question. How many hotspots of biodiversity in the world have been identified till date by Norman Myers?
a) 17
b) 25
c) 34
d) 43

Answer : C

Question. Renewable source of energy is
a) biomass
b) coal
c) petroleum
d) kerosene

Answer : A

Question. Which of the following represent maximum number of species among global biodiversity?
a) Fungi
b) Mosses and Ferns
c) Algae
d) Lichens

Answer : A

Question. Which of the following is the matching pair of a sanctuary and its main protected wild animal?
a) Kaziranga-Musk deer
b) Gir-Lion
c) Sunderban-Rhino
d) All of these

Answer : B

Question. A species facing extremely high risk of extinction in the immediate future is called
a) vulnerable
b) endemic
c) critically endangered
d) extinct.

Answer : C

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. The trees occurring in two seasons is the characteristic feature of
a) temperate deciduous forest
b) tropical savannah
c) grassland
d) coniferous forest

Answer : A

Question. Which of the following regions of the globe exhibits highest species diversity?
a) Western Ghats of India
b) Madagascar
c) Himalayas
d) Amazon forests

Answer : D

Question. Which one of the following is not used for ex-situ plant conservation?
a) Shifting cultivation
b) Botanical gardens
c) Field gene banks
d) Seed banks

Answer : A

Question. Which part of the world has a high density of organism?
a) Deciduous forests
b) Grasslands
c) Tropical rain forests
d) Savannahs

Answer : C

Question. The species diversity of plants on earth will be
a) 2.4% “
b) 22%
c) 8.1%
d) 85%

Answer : B

Question. Which one of the following is not a method of in situ conservation of biodiversity ?
a) Sacred grove
b) Biosphere reserve
c) Wildlife sanctuary
d) Botanical garden

Answer : D

Question: Which of the following group of plants exhibit more species diversity?
a) Fungi
b) Bryophytes
c) Algae
d) Angiosperms

Answer : A

Question. World Summit on Sustainable Development (2002) was held in
a) Argentina
b) South Africa
c) Brazil
d) Sweden.

Answer : B

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. Select the correct statement about biodiversity.
a) The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals.
b) Large scale planting of Bt cotton has no adverse effect on biodiversity.
c) Western ghats have a very high degree of species richness and endemism.
d) Conservation of biodiversity is just a fad pursued by the developed countries.

Answer : C

Question. A tree species in Mauritus failed to reproduce because of the extinction of a fruit-eating bird. Which one of the following was that bird?
a) Dove
b) Dodo
c) Condor
d) Skua

Answer : B

Question. Which one of the following have the highest number of species in nature?
a) Fungi
b) Insects
c) Birds
d) Angiosperms

Answer : B

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