Does any body have all the answers to Ward's AP Biology Lab # 4 Plant Pigment and photosynthesis? - wards ap biology lab 5 questions -8
1. that the pigment travels the farthest? Why?
2.When the summer, green leaves are usually more clear. What would you proceed from the fact that this shows that the role of the wavelength of light green, chlorophyll, and the process of photosynthesis
3.DESIGN an experiment to test his hypothesis of the previous question. Describe your experience or a drawing of the experimental facility.
4. Why Why leaves change color in autumn?
5.What is the role of chlorophyll in photosynthesis?
6. What are the accessory pigments and what are their responsibilities?
7. Research and other forms of chromatography are described.
8.What has Rf value represent? If we perform the experiment on the strip of chromatography twice the length l, it seemsD, HF-alike?
10. What is the absorption spectrum?
11.In what the spectrophotometer used for measurement of photosynthesis?
Friday, February 12, 2010
Wards Ap Biology Lab 5 Questions -8 Does Any Body Have All The Answers To Ward's AP Biology Lab # 4 Plant Pigment And Photosynthesis?
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Have served during the spring and summer the leaves as factories, where they most of the nutrients necessary for tree growth. This feeding process occurs in the leaves in many cells with chlorophyll, a pigment that gives the leaf its green color. Chlorophyll absorbs energy from sunlight and uses in the processing of carbon dioxide and water to carbohydrates such as sugar and starch. Using the green pigment leaves also contain yellow or orange Ary - which, for example, give the carrot to the known color. In most years, these colors are masked by the color yellow as much green fodder. But in the fall, partly due to changes in the time of day and temperature changes, keep their leaves making food. Chlorideophyll break disappears, the color green and yellow colors are visible as well as some of its luster autumn leaves.
At the same time, chemical changes can occur and cause the formation of additional pigments that vary from yellow to red to blue. Some of them lead to purple-red colors of autumn leaves of trees such as dogwood and sumac. Others give the sugar maple its brilliant orange or red and yellow. The autumn foliage of some trees such as poplar, birch and hickory, shows only yellow colors. Many oaks and others are brown, as a rule, then it is a gilded bronze. These colors are falling due to the different levels of mixing pigments of the leaf chlorophyll and others.
Autumn Weathergen nights for the formation of a bright red in autumn warm and sunny days are followed by cool nights with temperatures below 45 degrees F. Most of the sugar produced in the leaves during the day, but cool to prevent movement of sugar in the leaves. Formed from the sugars trapped in the leaves of the red pigment anthocyanin is. Family tree with leaves of red and scarlet in autumn are red maple, silver maple, cherry, Sweetgum, black or blackgum Tupelo, red oak, red oak and sassafras.
The degree of color may vary from one tree to another. For example, can be exposed to direct sun will rot in May, while the shady side of the same tree or other trees may be in the shade yellow. The foliage of some tree species such as Brown's death is boringand lower and shows no bright colors.
In addition, the colors in the same tree can vary from year to year, dependent on the combination of weather conditions. If the weather is much warmer fall clouds, rain, the leaves fewer red color. The least amount of sugar in the reduction of sunlight moves produced on the leaves during the warm evenings. Therefore, not leaving more sugar in the leaves of the pigments to form.
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