Biology

Class Data

Sec 002 Week 2 – Week 1
Control
Table # Change in Mass of transpirometer (g) Change in volume H20 (mL) (*This is our “evaporation loss)
1 -2.3 -2.5
2 ? -2.5
3 Tbirds -1.6 -2
4 -1.61 -1.8
Pothos *For all changes, calculated as Ending – Starting
Table # Change in Plant Mass (g) Change in Transpirometer Mass (g) Change in Water volume (Ending – Starting) Change in Water Volume – “Evaporation Loss” Total Leaf Surface Area (cm^2) Transpiration Rate (ml/day/cm^2) # stomata /cm^2 *Stomatal density values are from a different class, using the color photos on the slideshow, converted to #/cm^2 — up to you if you want to use the values you counted using the nail polish method, just be clear and discuss any possible errors with either strategy
1 -0.92 -5.73 -7.9 -5.4 76 -0.01015 1 40.7
2 -0.06 -6.16 -6 -3.5 140.5 -0.00356 2 122
3 Tbirds -0.17 -7.76 -10.5 -8.5 180 -0.00675 3 31.4
4 -0.11 -6.19 -6.75 -4.95 196.5 -0.00360
Purple Heart *For all changes, calculated as Ending – Starting
Table # Change in Plant Mass (g) Change in Transpirometer Mass (g) Change in Water volume (Ending – Starting) Change in Water Volume – “Evaporation Loss” Total Leaf Surface Area (cm^2) Transpiration Rate (ml/day/cm^2)
1 2.81 -5.825 -4.5 -2 340 -0.00084 # stomata /cm^2
2 -0.59 -2.06 -2.5 0 236 0.00000 1 14.1
3 Tbirds 0.21 -3.88 -4.5 -2.5 148.5 -0.00241 2 16
4 -0.32 0.75 -3.5 -1.7 168 -0.00145 3 15

Calculations

Week 1 Week 2 Sec 002 Week 2 – Week 1
sec 002 sec 002
Control Control Control
Table # Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) Table # Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) Table # Change in Mass of transpirometer (g) Change in volume H20 (mL) (*This is our “evaporation loss)
1 18.4 13 1 16.1 10.5 1 -2.3 -2.5
2 ? 13 2 15.83 10.5 2 ? -2.5
3 Tbirds 17.95 13 3 Tbirds 16.35 11 3 Tbirds -1.6 -2
4 18.4 13 4 16.79 11.2 4 -1.61 -1.8
Pothos Pothos Pothos *For all changes, calculated as Ending – Starting
Table # Stem length (in) Mass of plant (g) Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) # stomata / 0.25 cm^2 Table # Mass of plant (g) Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) # Leaves # squares filled by leaf (includes <50%) (Previous column) X 0.25 X 2 X #leaves = Total Leaf Surface (cm^2) Table # Change in Plant Mass (g) Change in Transpirometer Mass (g) Change in Water volume (Ending – Starting) Change in Water Volume – “Evaporation Loss” Total Leaf Surface Area (cm^2) Transpiration Rate (ml/day/cm^2)
1 5.25 3.51 21.34 14.4 1 2.59 15.61 6.5 1 152 76 76 1 -0.92 -5.73 -7.9 -5.4 76 -0.0102
2 10 3.7 21.5 13.5 2 3.64 15.34 7.5 1 281 140.5 140.5 2 -0.06 -6.16 -6 -3.5 140.5 -0.0036
3 Tbirds 5 7.85 24.56 15 3 Tbirds 7.68 16.8 4.5 3 ? 180 180 3 Tbirds -0.17 -7.76 -10.5 -8.5 180 -0.0067
4 6 6.86 23.98 13.25 4 6.75 17.79 6.5 3 131 196.5 196.5 4 -0.11 -6.19 -6.75 -4.95 196.5 -0.0036
Purple Heart Purple Heart Purple Heart *For all changes, calculated as Ending – Starting
Table # Stem length (in) Mass of plant (g) Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) # stomata / 0.25 cm^2 Table # Mass of plant (g) Mass of transpirometer (plant + water + tube) (g) Volume of water (with plant in it) (mL) # Leaves # squares filled by leaf (includes <50%) (Previous column) X 0.25 X 2 X #leaves = Total Leaf Surface (cm^2) Table # Change in Plant Mass (g) Change in Transpirometer Mass (g) Change in Water volume (Ending – Starting) Change in Water Volume – “Evaporation Loss” Total Leaf Surface Area (cm^2) Transpiration Rate (ml/day/cm^2)
1 10 5.82 26.445 14 1 8.63 20.62 9.5 10 68 340 340 1 2.81 -5.825 -4.5 -2 340 -0.0008
2 8.5 5.7 23.5 14 2 5.11 21.44 11.5 8 59 236 236 2 -0.59 -2.06 -2.5 0 236 0.0000
3 Tbirds 8 7.51 25.53 14 3 Tbirds 7.72 21.65 9.5 9 ? 148.5 148.5 3 Tbirds 0.21 -3.88 -4.5 -2.5 148.5 -0.0024
4 8 7.08 20.4 13 4 6.76 21.15 9.5

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