Grwoth is

plant grwoth in length is increased by

Grwoth regulator ethylene is used for

The tissues involves in secondary grwoth are :

The tissues involves in secondary grwoth are :

A grwoth inhibitor responsible for stomatal closure is

Grwoth hormone ( GH ) secretion is increased by all of the following factors EXCEPT

Study the following statements regarding food chains and select the correct ones. (i) Removal of 80% tigers from an area resulted in greatly increased grwoth of vegetation. (ii) Removal of most of the carnivores resulted in an increased population of deers. (iii) The lenght of food chains is generally limited to 3-4 trophic levels due to energy loss. (iv) The lenght of food chains may vary from 2 to 8 trophic levels.