Exercise 3: Which colors (wave-lengths) of light are most effective in driving photosynthesis? Now you have determined which plant pigments are most photosynthetically active, and you know which wavelengths of light are absorbed by the different plant pigments, you should be able to predict which wavelengths of light allow the greatest amount of photosynthetic activity in leaves. In order to investigate this, we exposed aquatic plants to filtered light. Filters are transparent films that transmit a assortment of light wavelengths. The color of the limited light that passes through the filter is the color that you see. All other colors of light are absorbed by the filter. We measure how much oxygen aquatic plants produce as they photosynthesize by tapping the plants' containers until all oxygen bubbles were released from the plant and floated Figure 8. Experimental design. Inverted test tubes with similar-length sections of aquatic plants were covered with various filters and placed equal distances from lamps. The plants were allowed to photosynthesize for one hour. After this time, the tubes were tapped to release oxygen bubbles, and the diameter of the bubble produced was recorded. to the top of the tube. Then we measured the diameter of the oxygen "bubble." Some plants received full-spectrum light (no filter), but others were covered by blue, red, and green filters (which limit the wavelengths reaching the plant to blue, red, and green, respectively). Finally, one plant was be covered with aluminum foil, so that no light reached it. (see Figure 8).
Exercise 3: Which colors (wave-lengths) of light are most effective in driving photosynthesis? Now you have determined which plant pigments are most photosynthetically active, and you know which wavelengths of light are absorbed by the different plant pigments, you should be able to predict which wavelengths of light allow the greatest amount of photosynthetic activity in leaves. In order to investigate this, we exposed aquatic plants to filtered light. Filters are transparent films that transmit a assortment of light wavelengths. The color of the limited light that passes through the filter is the color that you see. All other colors of light are absorbed by the filter. We measure how much oxygen aquatic plants produce as they photosynthesize by tapping the plants' containers until all oxygen bubbles were released from the plant and floated Figure 8. Experimental design. Inverted test tubes with similar-length sections of aquatic plants were covered with various filters and placed equal distances from lamps. The plants were allowed to photosynthesize for one hour. After this time, the tubes were tapped to release oxygen bubbles, and the diameter of the bubble produced was recorded. to the top of the tube. Then we measured the diameter of the oxygen "bubble." Some plants received full-spectrum light (no filter), but others were covered by blue, red, and green filters (which limit the wavelengths reaching the plant to blue, red, and green, respectively). Finally, one plant was be covered with aluminum foil, so that no light reached it. (see Figure 8).
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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I am stuck on four questions for this lab and they are:
1. What is the question being investigated in this experiment.
2. What is the independent variable?
3. What is the dependent variable?
17. What are the control treatments?
Transcribed Image Text:Exercise 3: Which colors (wave-lengths) of light are most effective in driving
photosynthesis?
Now you have determined which plant
pigments are most photosynthetically active, and
you know which wavelengths of light are
absorbed by the different plant pigments, you
should be able to predict which wavelengths of
light allow the greatest amount of photosynthetic
activity in leaves.
In order to investigate this, we exposed
aquatic plants to filtered light. Filters are
transparent films that transmit a
limited
assortment of light wavelengths. The color of the
light that passes through the filter is the color that
you see. All other colors of light are absorbed by
the filter. We measure how much oxygen aquatic
plants produce as they photosynthesize by
tapping the plants' containers until all oxygen
bubbles were released from the plant and floated
Figure 8. Experimental design. Inverted test tubes with
similar-length sections of aquatic plants were covered
with various filters and placed equal distances from
lamps. The plants were allowed to photosynthesize for one
hour. After this time, the tubes were tapped to release
oxygen bubbles, and the diameter of the bubble produced
was recorded.
to the top of the tube. Then we measured the
diameter of the oxygen "bubble." Some plants received full-spectrum light (no filter), but others were
covered by blue, red, and green filters (which limit the wavelengths reaching the plant to blue, red, and
green, respectively). Finally, one plant was be covered with aluminum foil, so that no light reached it. (see
Figure 8).
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