Data Tables and Graphs Useful for AP Investigation 4
Why do cells divide?
Surface area grows by the square,
while the volume grows by the
cube. The membrane never
catches up!
Fig. 7.5
A
B
Which cube size is best
suited to the diffusion of
nutrients to the center of the
cell!
C
Mass Gain/Loss of Dialysis Bags in Comparison to Sample Solutions
Increase in mass of dialysis bag


Bag is hypertonic
Solution is hypotonic
No change (or little change) in
mass of dialysis bag
 Bag is isotonic to the
solution
Decrease in mass of dialysis bag


Bag is hypotonic
Solution is hypertonic
Hypo or Hyper?
Hypo or Hyper?
Sucrose in tube
/ Water
Glucose in tube
/ Water
Ovalbumin in tube / Water
Sucrose in tube
/ 1 Mol NaCl
Glucose in tube
/ 1 Mol NaCl
Ovalbumin in tube / 1 Mol NaCl
NaCl in tube
/ 1 Mol Sucrose
Glucose in tube
/ 1 Mol Sucrose
Ovalbumin in tube / 1 Mol Sucrose
NaCl in tube
/ 1 Mol Glucose
Sucrose in tube
/ 1 Mol Glucose
Ovalbumin in tube / 1 Mol Glucose
Water in tube
Water in tube
Water in tube
/ 1 Mol NaCl
/ 1 Mol Sucrose
/ 1 Mol Glucose
NaCl in tube
/ 0.5 g Ovalbumin
Sucrose in tube / 0.5 g Ovalbumin
Glucose in tube / 0.5 g Ovalbumin
Red
Yellow
Green
Clear
Blue
% Increase in
Mass of Tissue
25%
20%
15%
10%
No change (or little
change) in mass of
dialysis bag
5%
0
-5%
-10%
% Decrease in
Mass of Tissue
-15%
-20%
-25%
0.0 M
0.2M
0.4 M
0.6 M
Molarity of Sucrose Solutions
0.8 M
1.0 M
Table 1.5: Yucca root Core Data
Red
Yellow
Green
Clear
Blue
Graph 1.3: Percent Change in Mass of Yucca Root Cores at
Different Molarities of Sucrose
% Increase in
Mass of Tissue
25%
20%
15%
10%
No change (or little
change) in mass of
dialysis bag
5%
0
-5%
-10%
% Decrease in
Mass of Tissue
-15%
-20%
-25%
0.0 M
0.2M
0.4 M
0.6 M
0.8 M
Molarity of Sucrose Solutions
1.0 M