3121: Man cannot digest cellulose whereas cows can do so because
(a) Their gut contains certain bacteria capable of digesting cellulose
(b) They have a many-chambered stomach
(c) They have efficient grinding molars
(d) They produce an enzyme cellulose which can digest cellulose
3122: A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other at
(a) 8.30 a.m.
(b) 8.10 a.m.
(c) 7.48 a.m.
(d) 7.42 a.m.
3123: The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
(a) The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out.
(b) The mangroves provide both food and medicines which people are in need of after any natural disaster.
(c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or Tsunami.
(d) The mangrove trees do not get uprooted by storms and tides because of their extensive roots.
3124: Consider the following countries :
1. Brazil
2. Indonesia
3. Japan
4. Russia
What is the descending order of the size of the following countries population wise ?
(a) 1, 2, 4, 3
(b) 2, 3, 1, 4
(c) 2, 1, 4, 3
(d) 1, 2, 3, 4
3125: Which one among the following States of India has the Lowest density of population ?
(a) Arunachal Pradesh
(b) Sikkim
(c) Meghalaya
(d) Himachal Pradesh