3486: Plankton refers to:
(a) A kind of fish
(b) A submerged platform in waters
(c) Drifting of organisms in a body of water
(d) A kind of animal living under water
3487: The minimum land area recommended for forest cover to maintain proper ecological balance in India is
(a) 25%
(b) 33%
(c) 43%
(d) 53%
3488: Mitakshara is
(a) A work on astronomy
(b) A treatise on ancient Hindu law of inheritance
(c) An Agamic text
(d) A compendium on medicine
3489: A rough outline map of northern Sri Lanka is shown in the figure. Jaffna is located at the point marked
(a) A
(b) B
(c) C
(d) D
3490: Amongst the following Indian States which one has the minimum total forest cover?
(a) Sikkim
(b) Goa
(c) Haryana
(d) Kerala