A farmer had been using a particular insecticide for a long time. What consequences will it have on- a) insect population b) soil ecosystem?

The farmer had been using a particular insecticide for a long time. What consequences will it have on Insect population.

The farmer had been using a particular insecticide for a long time. What consequences will it have on Soil ecosystem?

If insect population in an ecosystem is increased, what type of effect does it have in that ecosystem?

An object falling through a fluid is observed to have an acceleration given by a=g-bv where g is the gravitational acceleration and b is a constant. After a long time it is observed to fall with a constant velocity. What would be the value of this constant velocity?

(A): Spring balances show wrong readings after they has been used for a long time (R): On using for a long time, spring balances loose its elastic strength

(A) Honey has been used for a long time as an instant source of energy by vaids in ayurvedic medicine. (R) If the body needs glucose, enzymes break the glycogen down to glucose.