Answered: An experiment was done to determine how…

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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An experiment was done to determine how color of light and distance affects photosynthetic activity of the pond weed. Pond weed was placed in a test tube containing a solution of sodium hydrogen carbonate, and had its end cut; light was placed 50 cm away and four colors were tested (clear, red, blue, and green). After placing the light, the pondweed was given a certain amount of time to adjust before counting the bubbles, bubbles were counted for 1, 3, and 5 minutes. Only the bubbles that came out of the cut end was counted to represent the rate of photosynthesis. Below is the tabulated results. What are the possible factors or errors that could have affected clear/white light to have lower photosynthetic activity? In theory this should have the highest rate.

Result 2.2: Colors/Wavelength and Intensity of Light
Light Power
(W)
40
Distance
Colour
Time
Number of
(cm)
50
(min)
1 min
3 mins
Bubbles
Clear
3
9
15
6
5 mins
Red
1 min
3 mins
18
5 mins
30
Green
1 min
5
3 mins
15
5 mins
25
Blue
1 min
10
3 mins
30
5 mins
50

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