4276: Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
(a) Keystone species
(b) Allopatric species
(c) Sympatric species
(d) Threatened species
4277: Which of the following pairs is correct?
(a) Mahatma Gandhi : Swaraj is my birth right
(b) Jawaharlal Nehru : Truth and nonviolence are my God
(c) Sardar Patel : Dilli Chalo
(d) Subhash Chandra Bose : Give me blood, I will give you freedom
4278: Assertion (A)
A Rainfall is scanty on the east of Western Ghats.
Reason (R)
The east of Western Ghats is on the lee side.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
4279: ELISA test is prescribed for:
(a) AIDS
(b) Typhoid
(c) Polio
(d) Cancer
4280: Dehydration in the human body results due to loss of:
(a) Salts
(b) Water
(c) Vitamins
(d) Hormones