27 Jun BIO – Photosynthesis & Respiration Hands-On Labs,Inc.
Question
Photosynthesis &Respiration
Hands-OnLabs,Inc.
Version42-0102-00-01
LabRepoRtassistant
Thisdocumentisnotmeanttobeasubstituteforaformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment’squestions,diagramsifneeded,anddatatables thatshouldbeaddressedinaformallabreport.Theintentistofacilitatestudents’writingoflabreportsby providing this informationin an editable filewhichcan be sentto an instructor.
obseRvations
DataTable 1: PhotosyntheticRates
Rate
Distance(mm)
Solutionstartingmeasurement
Net photosynthesis
0mm
Respiration
1.5mm
Gross photosynthesis (net photosynthesis +respiration)
1.5
Rate of photosynthesis(gross photosynthesis / 10 min)
0.15
Bag mass 4.8 g + 1.5 g NaHCO3 = 6.3 Final mass(g)
DataTable 2:Respiration Results
Experimental
Conditions
Startingdistance
(mm)
Final distance
(mm)
Change in movement
(mm)
Time
(min)
WithElodea
WithoutElodea
Questions
Exercise 1:PhotosynthesisPartI
A.What molecules did the plant produce whenexposedto light?
B.The plant was exposed to oxygen
C.Whatresourceswereconsumedto produce the molecule?
D.
C. What part did light play in thereaction?
The light increased the distance the water moved by using the light the water converted into carbon dioxide.
D.What moleculewasconsumedby the plant while itwas in the dark? E. What moleculewas producedby the plant while itwas in the dark?F. Where did the moleculesgo thatwere produced in the dark?
G.What criticalservice do plants provide humans?
H.Would animal life onEarth be possible without plants?
I. Would any life onEarth be possible without sunlight?
Exercise 2:PhotosynthesisPartII
A.WhenyoublewthroughthestrawintotheBromothymolbluesolution,whatgasdidyouadd? Whatcolor change didyou observe in the solutionand why?
B. Whatcolorchangeoccurredafteryouplacedtheplantintotherespirometerandturnedon the light?
C. Whatwas happening when the solutionin the horizontal tubingstartedto move?D.How long did ittake thecolor changeto occurafterthe solutionstartedto move? E. Why did thecolor change?
F. Whenyourepeatedtheexperimentwithoutaplantintherespirometer,whathappenedand why?
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