The plants do not have a nervous system and sense organs like eyes, ears, or nose, etc., like the animals, but they can still sense things. The plants can sense the presence of stimuli like light, gravity, chemicals, water, and touch, etc., and respond to them. The plants can sense things like light, gravity, chemicals, water, and touch, etc., by the action of hormones in them. The stimuli like light, gravity, chemicals, water, and touch, etc., are called environmental changes. So, we can also say that the plants coordinate their behaviour against environmental changes by using hormones. The hormones in plants do not act the same way as in animals. The hormones in plants coordinate their behaviour by affeting the growth of a plant. And the effect on growth of the plant can result in the movement of a part of the plant like shoot (stem) or root, etc.1. The plants coordinate their behaviour against environmental changes by using_______(i) Hormones(ii) Nerves2. Do plant have a nervous system?(i) Yes(ii) No3. What do plants use for coordination?(i) Hormones(ii) Nerves4. The plants respond to various stimuli very _______ by growing.(i) Slowly(ii) Quickly5. Why plants cannot respond quickly?(i) Because plants have no nervous system(ii) Because plants have nervous system