Question
Among the following, which represents a true example of
a biological control strategy used specifically against insect pests?Solution
Parasitoid wasps lay eggs in or on insect pests, leading to their death, making them classical biological control agents. Sex hormones can be used for disruption but are not strictly biological control.
"Akash and Bittu can individually complete a task in 40 days and 50 days, respectively. They start working together, and after 10...
Priya and Meena alone can complete a project in 54 days and 81 days respectively. They work together and earn Rs. 9,100. Find the share of Priya.
Worker A can build a wall alone in 30 days. When A and B work together, they can complete the wall in 16 days. If B starts building the wall alone and w...
Binny is 20% more efficient than Ankush, while Ankush is 50% more efficient than Raju. If the three of them—Ankush, Binny, and ...
Ajay and Bheem collectively earned Rs.9,000 for completing a task, with Bheem's share being Rs.3,000. If Bheem can complete the work on his own in 48 da...
‘M’ and ‘N’ together can do a piece of work in 50 days. If ‘M’ is 50% more efficient than ‘N’, how long will ‘N’ take to do the work...
48 men can complete 3/5 part of a work in 8 days working 9 hours a day. How many women can complete rest of the work if they work for 6 hours a day for ...
The ratio of time taken by P, Q and R to complete work alone is 4:5:2 respectively. If all three together complete the work in 8 days, then find in how ...
‘P’ is 20% more efficient than ‘Q’. ‘P’ can do a piece of work in 15 days. They begin the work together, but ‘Q’ leaves after 6 days. Th...
A and B together, B and C together and A and C together can complete a piece of work in 44 days, 33 days and 36 days respectively. Find the ratio of the...