3. Photosynthesis Funnel Lab
1. Size of gas bubble can be measured to
determine rate of photosynthesis.
2. Factors that can limit amount of
photosynthesis are: Light, Water, Carbon
Dioxide.
3. No sunlight, no photosynthesis, no Oxygen
gas bubble.
4. Oxygen gas collected in test tube.
5. Increase light will increase photosynthesis.
5. Cell Respiration Lab
1. Sugar provides food (glucose) for the
yeast.
2. Glycolysis in the cytoplasm, then aerobic
respiration in the mitochondria.
3. Alcohol Fermentation
4. Balloon filled with Carbon Dioxide.
Measure volume of balloon (Quantitative)
Smell of Alcohol (Qualitative)
5. To compare the experimental group to
determine results.
7. Plant and Animal
Interrelationship
All blue to start (bromothymol blue)
Control is BB only
Snail only turned clear/greenish
Color change due to carbon dioxide
released by snail (respiration) making
carbonic acid indicated by BB.
Plant photosynthesis, snail respiration
No light, no photosynthesis, carbon dioxide
build up = color change.
Each takes in what the other releases!!!
8. Osmosis in Elodea Leaves
Hypotonic Hypertonic
Distilled Water Salt Water
9. Osmosis in Elodea Leaves
Structure of leaf cell is boxy and green.
Structure fits function because cells perform
photosynthesis (green chlorophyll) and need
lots of water (cell wall keeps cell from bursting
– cytolysis)
Cells in salt water lost water, cell membrane
shrinks away from cell wall.
Salt water is hypertonic, water moved out.
Hypotonic best for plant cells – water moves
in.
10. Passive Transport Review
1. Osmosis is the diffusion of water.
2. Molecules move from High Con. To low
concentration – into the cell!
3. Fresh water is Hypotonic.
4. Blood cells bursts (cytolysis) Hypotonic
5. Molecules continue to move in and out at
the same pace at equilibrium.
6. Water moves out of cells due to osmosis
reducing turgor pressure resulting in
plasmolysis.
12. Critical Thinking
A. Solution in Hyptertonic, Solutes move
into cell , Water moves out of cell
B. Solution is Hyptonic, solutes move out
of cell, water moves into cell.
C. Solution is Isotonic, solutes and water
move in and out equally
13. Critical Thinking
1. A. 0.9% is isotonic, 0.7% is hypotonic, cell
will swell and burst (cytolysis)
B. 10% is Hypertonic, cell will shrink.
2. Cell wall keeps plant cells from bursting.
3. Cells suffer plasmolysis (water leaves)
4. Solutes are equal inside and outside cell
5. Molecules continue to move at equal
pace in and out of cells.
6. Pressure water exerts against the cell wall.
