Question
Which of the following statements are correct about weed
shift? Statement I - Susceptible species are killed by the weed management practices while resistant ones grow, reproduce, and increase in the community, resulting in a weed shift. Statement II - A weed shift means that the habitat of a weed species is changed due to change in environmental conditions.Solution
Weed shift refers to change in composition or relative frequencies of weeds in a weed population in response to natural or human-made environmental changes in an agricultural system is known as weed shift.
Ramesh covered 300 km in total â part of the journey was by auto at 60 km/h, and the rest by walking at 6 km/h. If total time was 9.5 hours, what dist...
A biker travels at a speed of 23 km/hr for 7 hours each day on all days except Sunday. If his journey starts on a Wednesday, on which day will he reach ...
A train travels from Station A to Station B at a speed of 60 km/h and returns from Station B to Station A at a speed of 40 km/h. If the distance between...
A train travels from station âPâ to station âQâ at a constant speed. If its speed was increased by 20 km/h, it would have taken 1 hour less to c...
Ram makes four trips of equal distances. His speed on first trip was 120 km/hr and in each subsequent trip his speed was half of the previous trip. What...
A thief snatched a lady's purse and began running north towards a bus that was 200 meters away. A policeman, who was standing 40 meters south of the lad...
Identify the cases where two objects moving in opposite directions have a relative speed of 30 km/h.
- A person completes a journey in 300 minutes by train at a speed of 60 km/h. What should be his speed by bus to cover the same distance in 7 hours?
A,B and C run around a Circular track starting from the same point simultaneously and in the same direction at the speed of 8 kmph, 12 kmph and 16 kmph ...
- Bus 'X' and Bus 'Y' start together from a station heading in the same direction. Bus 'X' moves at 18 km/h while Bus 'Y' moves at 30 km/h. Determine the dis...
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