bio lab quiz 2 (photsynthesis)

what does photosynthesis produce

oxygen as a byproduct

why did we use the syringe

remove air from discs so they would sink

why did we use bicarbonate solution

source of water and CO2

what indicated the amount of photosynthesis that occurred

floating discs, leaf discs photosynthesize in light and produce oxygen which makes them float

what lights did we compare

red, blue and green light

which color light was our positive control

white, because it is all the visible colors

do plants use colors the are absorbed or reflected

absorbed

what colors worked vs which one didn’t

green did’t work because it was reflected and blue and red did work because it was absorbed

how is color of light absorbed versus reflected shown in the absorption spectra experiment

the peaks of absorption for visible light were in the low wavelength range(violet to blue) and high range(red)

what were the peaks of absorption for visible light

low wavelength range (violet to blue) and high range (red)

What did the pigments absorb

red and clue best especially the 2 chlorophylls

what did red and blue do

powered the most photosynthesis in the leaf

what pigments did we identify in spinach leaf extract

-chlorophyll A and B,

-xanthophyll

-carotene

what does the p value tell us about our data

p less then or equal to 0.05 means statistically significant

what does the chi square value mean

compares the results we got to those we have expected if the null hypothesis was true (null hypothesis = all colors work the same)