Q. No.Which of the following is not correct about Fragmentation?
(1) Large habitats are broken up into small fragments due to various human activities
(2) Mammals and birds are affected by fragmentation as they need large territory
(3) Certain animals with migratory habits are badly affected leading to population decline
(4) The main reason for the cause of fragmentation is soya bean cultivation
(1) Large habitats are broken up into small fragments due to various human activities
(2) Mammals and birds are affected by fragmentation as they need large territory
(3) Certain animals with migratory habits are badly affected leading to population decline
(4) The main reason for the cause of fragmentation is soya bean cultivation
Which of the following are the extinctions caused by over-exploitation for the last 500 years?
(1) Steller's Sea cow
(2) Passenger Pigeon
(3) Dodo
(4) Both (1) and (2)
Which of the following is wrong information about the consequences of Alien Species Invasions?
| 1. | Nile Perch - Alien Species |
| 2. | Lake Victoria in East Africa - the ecosystem in which alien species was introduced |
| 3. | Cichlid fish: extinct species |
| 4. | Number of extinct species: 176 |
Which of the following is not an example of Alien species for our ecosystems?
(1) Carrot Grass
(2) Indigenous catfishes
(3) Lantana
(4) Eichhornia
The recent illegal introduction of the African catfish……..for aquaculture purposes is posing a threat to the indigenous catfishes of our Rivers
(1) Clarius gariepinus
(2) Cichlid fishes
(3) Parthenium
(4) Steller's Sea cow
Which of the following is not an example of Co-extinctions?
(1) Plant-pollinator mutualism
(2) Host-parasite extinction
(3) Plant-animal species in an obligatory relationship
(4) Fragmentation in Amazon Rain Forests and Species of mammals
Which of the following is not a narrowly utilitarian reasons for the conservation of Biodiversity?
(1) Direct economic benefits like cereals, pulses and Fruits
(2) Firewood, Fibre, construction material
(3) Tannins, lubricants, dyes, resins, perfumes
(4) Oxygen, Aesthetic Pleasure
Select the incorrect statement
1. India has more than 50,000 genetically different strains of rice
2. India has 100 varieties of mango
3. The genetic variation in Rauwolfia vomitoria can be in terms of concentration and potency of reserpine
4. The tropical rainforest initially covered 14% of the land surface of earth, but now they cover only 6% of the land area
Consider the following statements:
I. The extinction of stellar’s cow and passenger pigeon is attributed to over-exploitation.
II. The thylacine was the largest known carnivorous marsupial of modern times.
III. Alien species invasion has led to the extinction of many cichlid fish species in lake Victoria.
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
Consider the following statements:
I. India’s share of the global species diversity is 8.1% approximately.
II. Two ecological hot spots of the world cover our bio-diversity regions.
III. The Amazon rainforest has the greatest biodiversity on Earth.
Which of the above statements are true?
1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
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