Response of different organisms to the environmental rhythms of light and darkness is called?
Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals. Photoperiodism can also be defined as the developmental responses of plants to the relative lengths of light and dark periods.
There are two trains A and B. A start from point X at 5 AM towards point Y. Another train B starts at 6 AM from point X. If they meet at 10 AM an...
A train 325 metre long takes 45 sec to cross a man running at a speed of 6 km/hr in the direction opposite to that of train. What is the speed of the tr...
Train A running at a speed of 45 km/hr crosses train B in 30 seconds. Find the speed of train B (in km/hr), if the sum of the length of train A and B is...
Train A running at speed of 72 km/hr crosses a platform having twice the length of train in 18 sec. Train B whose length is 300m crosses same platform i...
Two trains start at the same time from Patna and Delhi and proceed toward each other at the speed of 120 km/hr and 60 km/hr respectively. When they meet...
Two cars start from a place with a speed of 45 km/hr at an interval of 10 minutes. What is the speed of a man coming from the opposite direction towards...
Ratio of the lengths of two trains ‘X’ and ‘Y’ is 5:6 respectively and the ratio of time taken by them to cross a pole is 3:4 respectively. If s...
A train can cross a pole, a bridge of 600 meter long and platform of 400 meter long in 13 seconds, _____ seconds and 29 seconds, respectively.
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Two trains of same length are running in parallel tracks in the same direction with speed 50 km/hr and 80 km/hr respectively. The latter completely cros...
Two trains of equal lengths take 30 seconds and 45 seconds respectively to cross a telegraph post. If the length of each train be 450 metres, in what ti...