Watch the videos and then answer the following questions.
Directions: Questions 1 and 3 refer to the following set-up used to investigate the need for chlorophyll, light and carbon dioxide in photosynthesis. A plant with variegated leaves was placed in the dark for two days. A leaf from the plant was then treated as shown below. After leaving the set-up in the light for several hours, iodine test was carried out on the leaf.