Africa’s red- billed oxpeckers had long been thought to aid mammals like the impala by picking ticks off their skin-an example of mutualism. But British biologist Paul Weeks kept oxpeckers away from a group of oxen and found no change in the number of ticks. On other oxen, oxpeckers picked at existing wounds delaying the healing time. A conclusion that can be drawn from the above is
Correct Answer : C
In each of the following questions two or more statements are given under P and Q respectively. These statements are followed by one inference each. On the basis of the statements, mark one of the following choices. P. Some books are friends. All books are pencils. Therefore some pencils are friends. Q. All pencils are books. Some friends are books. Therefore some friends are pencils
Economic nationalism, it would seem, still survives. It is alive and kicking in India. Which of the following statements, if true, weakens the argument above?
Hudson is in Moscow and New York has Yamuna. So, Volga may be in Paris or Tokyo whereas Ya Fen may be in Tokyo or Delhi. Siene may be in Paris or Tokyo or Delhi. If Volga flows through Paris, Ya Fen flows through Delhi.