lab 6 photosynthesis

lab 6 photosynthesis - Erika Blair March 5, 2012 Shannon...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Erika Blair March 5, 2012 Shannon Ulrich BELS 311 LAB Title: Photosynthesis For questions, background information, hypotheses, experimental design, predictions, materials, and a procedure flow chart, please see attached carbon copy sheet pre-lab. Data Summary: Observation of a Lettuce Leaf 400x 0.1mm estimated stoma size ≈ 2 μm estimated guard cell size ≈ 7 μm estimated epidermal cell size ≈ 12 μm With the presence of 0.2% bicarbonate time (min) floating leaf discs 0 0 1 0 2 0 3 0 4 5 5 7 6 10 ET 50 , or the approximate time it took for half (in this case five) of the discs to float was 3:48 minutes.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Without the presence of 0.2% bicarbonate time (min) floating leaf discs 0 0 1 0 2 0 3 0 4 5 5 7 6 10 ET 50 As indicated by the above data for the guided activity, only the leaf discs that were sunk in a solution containing bicarbonate began to float. Half the discs floated in the bicarbonate solution at 3 minutes and 48 seconds, and all of the discs were floating by minute 6. None of the discs ever floated in the solution that didn’t contain bicarbonate, and therefore the time that half the discs floated at approaches infinity. With the presence of 0.4% bicarbonate time (min) floating leaf discs 0 0 1 0 2 0 3 0 4 0 5 3 6 4 7 6 8 10 ET 50 , or the approximate time it took for half (in this case five) of the discs to float was 3:16 minutes. With the presence of 0.6% bicarbonate
Background image of page 2
time (min) floating leaf discs 0 0 1 0 2 0 3 2 4 7 5 7 6 8 7 9 8 9 9 10 ET 50 was 6:12 minutes. As indicated by the above data for the inquiry activity, half the discs floated in the 0.4% bicarbonate solution at 3 minutes and 16 seconds, and all of the discs were floating by minute 8. In the 0.6% bicarbonate solution, half the discs were floating at 6 minutes and 12 seconds, and all were floating by minute 9. Of the three bicarbonate concentrations observed in this activity, 0.6% bicarbonate caused the slowest ET 50 of 6:12, and the 0.4% bicarbonate caused the quickest ET 50 of 3:16. 0.2% bicarbonate caused an ET 50 of 3:48. Analysis:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/20/2012 for the course BIO 311 taught by Professor Schoonmaker during the Spring '12 term at Colorado.

Page1 / 5

lab 6 photosynthesis - Erika Blair March 5, 2012 Shannon...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online