Loss of Biodiversity
Trending Questions
Q. What is true regarding background extinction?
- Calculated from widespread events that wipes out the majority of living plants and animals.
- The extinction of individual species due to natural environmental or ecological factors.
- Calculated from rate of extinction that occurred before homo sapiens appeared on Earth.
- Species going extinct once every thousand years.
Q.
The rate at which species go extinct without human interference is called ___.
- Extinction rate
- Massive extinction rate
- Background extinction rate
- All of the above
Q. Wildlife is destroyed mainly due to
- The impact of introduced species
- Mass scale hunting for foreign trade
- All of the above
- The destruction of natural habitats
Q.
What are the major causes of extinction?
Habitat loss and fragmentation
Over-exploitation
- Alien species invasion
Co-extinction
Q. Most of the endangered species are victims of
- Completion with introduced species
- Habitat destruction
- Over-hinting
- Acid rain
Q. Which of the following is true regarding background extinction?
Plant breeding
Plant conservation
Animal breeding
Project tiger
Q.
Genetic biodiversity in agricultural crops is threatened by_________
introduction of high yielding varieties
intensive use of fertilizers
extensive intercropping
intensive use of biopesticides
Q.
Dodo is
Critically endangered
Rare
Endangered
Extinct
Q. Extinction occurs at a natural rate.
- False
- True
Q. During the period since the origin and diversification of life on earth, there have been episodes of mass extinction.
- three
- four
- five
- six