3487: Consider the volumes of the following:
1. A parallelepiped of length 5 cm, breadth 3 cm and height 4 cm
2. A cube of each side 4 cm
3. A cylinder of radius 3 cm and length 3 cm
4. A sphere of radius 3 cm
The volumes of these in the decreasing order is
(a) I, III, II, IV
(b) IV, II, III, I
(c) I, II, III, IV
(d) IV, III, II, I
3489: Recently, several hundred South Africa soldiers were sent to Burundi
(a) to side with the Tutsi tribe in the country's civil war
(b) to side with the Hutu tribe in the ongoing ethnic conflict
(c) as a part of United Nations special force to keep control on the ethnic groups revolting against the government
(d) as South Africa's protection force to help mediate and agreement between warring groups of civil war
3490: 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