Rich biodiversity is not important for

(1) Healthy ecosystem

(2) Survival of human race on this planet

(3) Alien species

(4) Both A and B

(1) Stanford Ecologist

(2) Rivet Popper Hypothesis

(3) Importance of species actually affects the extent of stability of ecosystem

(4) Worked on Outdoor plots for the apology he proposed

(1) The long term ecosystem experiments using out door plots with less species showed less year to year variation in total number

(2) The long term ecosystem experiments using out door plots with more species showed less year to year variation in total biomass

(3) The long term ecosystem experiments using out door plots with more species showed more year to year variation in total number

(4) The long term ecosystem experiments using indoor plots with less species showed less year to year variation in total biomass

(1) Airplane: ecosystem

(2) Rivets: species

(3) Popping a rivet: causing a species to become extinct

(4) Flight safety: number of species

(1) Loss of rivets on the wings

(2) Loss of rivets on the seats

(3) Loss of rivets on Windows inside the plane

(4) Both A and C

(1) Loss of the key species that drive the major ecosystem functions is a more serious threat to flight safety than loss of other less important species

(2) Proper functioning of ecosystem is initially may not be affected by species loss

(3) Over a period of time, if the species loss is continuous, the ecosystem gets affected after a time

(4) Even the loss of not much significant species lead to crtical damage to ecosystem.

(1) 5000 species of native birds

(2) 2000 species of native birds

(3) 1500 species of mammals

(4) 3500 species of mammals

(1) Vertebrates-338

(2) Invertebrates-359

(3) Plants-87

(4) Bacteria-104

(1) Last 240 years

(2) Last 500 years

(3) Last 300 years

(4) Last 400 years

(1) Dodo-Mauritius

(2) Quagga-Africa

(3) Thylacine-Australia

(4) Steller's Sea Cow- Stanford