Sixth Extinction presently in progress is different from the previous episodes by some reasons except

1. Difference in the rates

2. Current rate is 100-1000 times faster than previous episodes

3. Human intrusions

4. Extinction of special bird species

(1) Nearly half of all the species on Earth can be wiped out within the next 100 years

(2) Nearly one fourth of all the species on Earth can be wiped out within 200 years

(3) Nearly one eighth of all the species on Earth can be wiped out within 100 years

(4) Nearly one third of all the species on Earth can be wiped out within 200 years

(1) Decline in plant production

(2) Lowered resistance to environmental perturbations such as drought

(3) Increased variability in certain ecosystem processes such as Plant Productivity

(4) Decreased variability in certain ecosystem processes such as pest and disease cycle

(1) Habitat loss and Fragmentation

(2) Dosage compensation

(3) Alien Species Invasions

(4) Co-extinctions

(1) Habitat loss and Fragmentation

(2) Over-Exploitation

(3) Alien Species Invasions

(4) Co-extinctions

(1) Tropical Rain forest

(2) Temperate Deciduous forest

(3) Temperate Evergreen forest

(4) Grasslands

(1) 17,10

(2) 14,6

(3) 12,4

(4) 7,3

(1) Huge and called lungs of Planet

(2) Harbour millions of species

(3) Amazon forests were being cut and cleared for cultivation of Brassica

(4) Conversion to grasslands and for raising beef cattle among the other reasons for cutting of Amazon forests

(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) Steller's Sea cow

(2) Passenger Pegion

(3) Dodo

(4) Both A and B