4.1.1 Study: Photosynthesis Introduction

Photosynthesis is the process in which the plants produce the green pigment called chlorophyll in the presence of food, water sunlight, air, wind etc.

trachea, alveoli, lung capillaries, arteries

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms