Genetic diversity in agricultural crops is threatened by
(a) introduction of high yielding varieties
(b) intensive use of fertilizers
(c) extensive intercropping
(d) intensive use of biopesticides.
One of the ex situ conservation methods for endangered species is
(a) wildlife sanctuaries
(b) biosphere reserves
(d) national parks.
Keystone species deserve protection because these
(a) are capable of surviving in harsh envinmental conditions
(b) indicate presence of certain mineral in the soil
(c) have become rare due to over exploitation
(d) play an important role in supporting other species.
Biosphere reserves differ from National Parks and Wildlife sanctuaries because in the former
(a) human beings are not allowed to enter
(b) people are an integral part of the system
(c) plants are paid greater attention than the animals
(d) living organisms are brought from all over the world and preserved for posterity
Beta diversity is diversity
(a) in a community
(b) between communities
(c) in a mountain gradient
(d) on a plain
Which of the following is best method of germplasm conservation ?
(b) Botanical garden
(c) Seed bank
(d) Zoological park
Which one has the largest species variety in India ?
Dust, oolong and brick are varieties of
India is one of the twelve megadiversity countries with ______ of genetic resources of the world.
Which of the following is not an invasive species?
(a) Parthenium hysterophorus
(b) Nelumbo (lotus)
(c) Lantana camara
(d) Eichhornia crassipes