Loss of biodiversity may lead to all except:

1.	decline in plant production
2.	increased resistance to environmental perturbance
3.	increased variability in water use
4.	increased variability in pest and disease cycle

The main difference between the “Sixth Extinction” and the previous five extinctions is that the sixth extinction:
1. is mainly occurring on islands
2. is mainly affecting plants
3. is occurring at a faster rate
4. does not involve human activities

Which group, amongst the following, has the maximum percentage of species facing threat of extinction?

Which of the following species of tiger has not gone extinct?

The largest carnivorous marsupial that got extinct in 20th century was:
1. Dodo
2. Quagga
3. Thylacine
4. Stellar’s sea cow

Year-to-year variation shown by areas with more species is ................... with respect to areas with less species.

The rivet popper hypothesis was given by:

Which of the following is not a reason that accounts for greater biodiversity of tropics?

Although, India has only 2.4 % of world’s area, its share of global species diversity is about:

Approximately, what number of species have been identified, named and studied?