Question
The pest density at which control measures should be
applied to prevent an increasing pest population is _____Solution
An economic threshold is the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest.
Heat stored in water vapour is –
Which of the following statements is true when we see 'rainbow'?
Which material is primarily responsible for the elasticity found in leggings and athletic apparel?
The splitting up of white light into seven colours on passing through a glass prism is called as
A ray of light from the object parallel to principal axis of a concave lens, after refraction appears to diverge from which point on the same side of th...
The instrument for measuring intensity of earthquakes is called –
What is the SI unit for measuring speed?
The hair of shaving brush clings together when removed from water due to –
The instrument which uses sound waves to measure the depth of oceans is –
Which one of the following animals can hear ultrasonic sound?
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