CBSE Class 12 Biology Biodiversity and Conservation MCQs Set 07

Question: Which one of the following shows concept of species-area relationship?
a) The number of species in an area increases with the size of the area.
b) Larger species require larger habitat areas than do smaller species.
c) Most species within any given area are endemic.
d) The larger the area, the greater the extinction rate.
Answer: a

Question: Which of the following is not a step in understanding biodiversity?
a) Naming the species
b) Looking at other related species
c) Assessing the species geographic range
d) Quantifying the species genome
Answer: d

Question: Best way to preserve the wild life is
a) to kill the predators.
b) vaccinize the animals.
c) to preserve natural habitat.
d) optimize the breeding habit.
Answer: c

Question: Biodiversity loss occurs due to the reasons given below. Identify the correct reasons.
a) (i) and (ii)
b) (i), (ii) and (iii)
c) (ii), (iii) and (iv)
d) (i), (ii), (iii) and (iv)
Answer: d

Question: Sacred groves are found in
a) Khasi and Jaintia Hills in Meghalaya.
b) Aravalli Hills of Rajasthan.
c) Western ghat regions of Karnataka and Maharashtra and Sarguja, Chanda and Bastar areas of Madhya Pradesh.
d) All of the above
Answer: d

Question: Which of the following is done in a wild life sanctuary?
a) conservation of fauna
b) conservation of flora
c) utiliation of soil and flora
d) prohibition of hunting
Answer: a

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion. 
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question. Assertion: Communities that comprise of more species tend to be more stable.
Reason: A higher number of species results in less animal variation in total biomoss.
Answer: a

Question. Assertion: The presently occurring species extinction is different from the mass extinctions that have occurred earlier.
Reason : Extinction in present day is due to natural causes, whereas earlier it was due to man-made causes.
Answer: c

Question. Assertion: Diversity observed in the entire geographical area is called gamma diversity.
Reason : Biodiversity decreases from high altitude to low altitude.
Answer: c

Matching Type Questions

Question: Match column-I with column-II and choose the correct option.

     Column-I                                      Column-II
A. Nile Perch in Lake                    I. Obvious reasons for Victoria biodiversity conservation
B. Narrowly utilitarian                   II. Habitat destruction
C. Main cause for                        III. High endemism biodiversity loss
D. Hotspots                                 IV. Alien species

(a) A – II, B – I, C – IV, D – III
(b) A – IV, B – I, C – II, D – III
(c) A – I, B – III, C – II , D – IV
(d) A – II, B – I, C – III, D – IV
Answer: b

Question: Match column -I with column- II and choose the correct option.

     Column-I                                                Column-II
A. Biodiversity                                          I. Edward Wilson
B. In-situ conservation                             II. Co-extinction
C. Plant pollinator mutualism                  III. On-site conservation
D. Ex-situ conservation                           IV. Off-site conservation

(a) A – II, B – I, C – IV, D – III
(b) A – IV, B – I, C – II, D – III
(c) A – I, B – III, C – II , D – IV
(d) A – II, B – I, C – III, D – IV
Answer: c

Question: Match the following and then choose the correct option.

    Column-I                                                    Column-II
A. Endemism                                  I. Khasi and Jaintia hills Meghalaya
B. Hotspot of India                         II. Advanced ex-situ conservation
C. Sacred groove                          III. Species found in a particular area only
D. Cryopreservation                      IV. Zoological park and Botanical gardens
E. Ex-situ conservation                  V. Western Ghats

(a) A – III, B – V, C – I, D – II, E – IV
(b) A – I, B – II, C – III, D – IV, E– V
(c) A – II, B – III, C – IV, D – V, E – I
(d) A – V, B – I, C – IV, D – II, E – III
Answer: a

Question: Match the following and choose the correct option.

    Column-I                                                    Column-II
A. Narrowly utilitarian                    I. Conserving biodiversity argument for major ecosystem services 
B. Broadly utilitarian                     II. Conserving biodiversity argument for philosophical or spiritual need to realise that every species has intrinsic value and
                                                       moral duty to pass our biological legacy in good order to future generation.
C. Ethical argument                     III. Conserving biodiversity for direct economic benefits like food, medicine, industrial products etc.

(a) A – I, B – II, C – III
(b) A – III, B – I, C – II
(c) A – II, B – I, C – III
(d) A – I, B – III, C – II
Answer: b

Question: Match the following and choose the correct option.

Column-I                                                                     ​​​​​​​                 Column-II
A. Over-exploitation by humans                                      I. Environmental damage and threat to native species
B. Introduction of Nile Perch in Lake Victoria                  II. Decline in plant population
C. Less solar energy                                                      III. Extinction of more than 2000 species of native birds
D. Introduction of Water Hyacinth in India                     IV. Extinction of Cichlid fish 
E. Colonization of tropical pacific Islands                       V. Extinction of Passenger pigeon

(a) A – II, B – V, C – IV, D – III, E – I
(b) A – V, B – IV, C – II, D – I, E – III
(c) A – I, B – II, C – III, D – IV, E – V
(d) A – IV, B – I, C – II, D – V, E – III
Answer: b

Critical Thinking Questions

Question: Which one of the following pairs of organisms are exotic species introduced in India?
a) Nile perch, Ficus religiosa
b) Ficus religiosa, Lantana camara
c) Lantana camara, Water hyacinth
d) Water hyacinth, Prosopis cinereria
Answer: c

Question: A threatened species category includes
a) only endangered species.
b) only vulnerable species.
c) endangered and rare species.
d) endangered, vulnerable and rare species.
Answer: d

Question: Biosphere reserves differ from national parks and wildlife sanctuaries because in the former
a) human beings are not allowed to enter.
b) people are an integral part of the system.
c) plants are paid greater attention than the animals.
d) living organisms are brought from all over the world and preserved.
Answer: b

Question: Following arrangement is correct from the point of view of decreasing biodiversity in angiosperms (N), fungi (F), pteridophytes (P) and algae (A).
a) N > F > P > A
b) N > F > A > P
c) F > N > P > A
d) F > N > A > P
Answer: d

Question: All forms of life should be conserved because
a) they maintain diverse genetic resources.
b) they have economic values.
c) they are important for maintaining balance of nature.
d) they will be otherwise lost.
Answer: a

Question: Animal species should be preserved mainly because
a) zoologists want to study them.
b) they are lovely creatures.
c) they are useful to mankind.
d) man cannot recreate a species of animals after its destruction.
Answer: d

Question: If S is species richness, A is area, Z is slope of the line, and C is Y-intercept, then the species richness will be shown as
a) S = C + Az
b) S = C + AZ
c) S = C. AZ
d) S = C. Az
Answer: d

Question: The greatest threat to global biodiversity is
a) natural disasters such as storms
b) pollution
c) overexploitation of natural resources
d) alteration of habitats by humans
Answer: d