Failure of a viable pollen to grow down the style of the flower of the same variety is called ___________.
Self-incompatibility is widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing.
How many seconds will a train 64 m in length, travelling at the rate of 42 km an hour, take to pass another train 82 m long, proceeding in the same dire...
A train can cross a pole, a bridge of 510 meter long and platform of 450 meter long in 11 seconds, _____ seconds and 26 seconds, respectively.
Th...
Two cars start from a place with a speed of 60 km/hr at an interval of 15 minutes. What is the speed of a man coming from the opposite direction towards...
A train running at 25 km/hr takes 36 seconds to pass a platform. Next, it takes 14 seconds to pass a man walking at 7 km/hr in the same direction. Find ...
A person sees a train passing over 4 km long bridge. The length of the train is half that of bridge if the train clears the bridge in 4 mins. What is th...
A train started from station P and preceded towards station Q at a speed of 90 km/h. 54 minutes later, another train started from station Q and preceded...
A train running at 90 km/hr crosses a vertical pole in 5 seconds and a platform in 20 seconds. Determine the length of the platform.
A train travelling with a speed of 72 km/h can cross a pole in 8 seconds. Find the time taken by the train to cross a 200 metres long platform if the sp...
1200 metres long train crosses a man who is moving in the same direction with a certain speed in 25 seconds. If the same train can cross a pole in 20 se...
A train 200 metre long takes 30 sec to cross a man running at a speed of 4 km/hr in the direction opposite to that of train. What is the speed of the tr...
