A biology class wants to perform an experiment to investigate the effect of diff
ID: 3522225 • Letter: A
Question
A biology class wants to perform an experiment to investigate the effect of different colors of light on seed germination. They wrap clear for red, and clear cellophane and plant three seeds in each one. What part do the three colors of cellophane play in this experiment? A biology class wants to perform an experiment to investigate the effect of different colors of light on seed germination. They wrap clear for red, and clear cellophane and plant three seeds in each one. What part do the three colors of cellophane play in this experiment?Explanation / Answer
Seed germination induce by many factors, one of them are light colors. Germination is regulated by a pigment, phytochrome, which is sensitive to different wavelenghts of light. When far red light is receive the phytochrome equilibrium changes towards the red light absorbing form. The reverse occurs when red light is receive. Phytochrome has function in stimulating or inhibiting of germination seeds.The control plants will do better than the plants that are only exposed to one wavelength of light. The plants will grow better in red and blue light than in green light. The plants will grow toward red and blue light but will not move toward the green light.The highest energy light is at the purple or violet end of the color light spectrum. Purple and violet lights have short wavelengths and thus lots of energy. At the other end of the spectrum, you will find red light which has long wavelengths and emits lower energy.Regardless of whether the color of the light is red or purple the plant will absorb some amount of energy from the light it is receiving. Green light is the least effective for plants because they are themselves green due to the pigment Chlorophyll.Different color light helps plants achieve different goals as well. Blue light, for example, helps encourage vegetative leaf growth. Red light, when combined with blue, allows plants to flower. Cool fluorescent light is great for cultivating plant growth indoors.