541: Nehru Model of Development laid greater stress on:
(a) Collective use of land
(b) Using imported seeds
(c) Agricultural development
(d) Rapid industrialisation with particular emphasis on the development of basic and heavy industries
542: Antigen is a substance which
(a) destroys harmful bacteria
(b) is used to treat poisoning
(c) lowers body-temperature
(d) stimulates formation of antibody
543: Which one of the following is the correct chronological order of the formation as full States of the Indian Union ?
(a) Sikkim-Arunachal Pradesh-Nagaland-Haryana
(b) Nagaland-Haryana-Sikkim-Arunachal Pradesh
(c) Sikkim-Haryana-Nagaland-Arunachal Pradesh
(d) Nagaland-Arunachal Pradesh-Sikkim-Haryana
544: Consider the following minerals:
1. Calcium
2. Iron
3. Sodium
Which of the minerals given above is/are required by human body for the concentration of muscles?
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
545: Chlorophyll is a/an:
(a) Halogen acid
(b) A green pigment found in the plants
(c) A chloro-organic compound
(d) Element