What is a controlled variable in the investigation?
A. amount that cell grows
B. type of cell
C. initial surface area of cell
D. life span of cell
What is the independent variable in the investigation?
A. amount that cell grows
B. type of cell
C. initial surface area of cell
D. lifespand of cell
Which two of the following claims can be made.
A. the amount of expansion of the cell depends on the type of cell
B. the size of the cells never changes
C. cell type and amount of expansion by osmosis are not related
D. animal cells expand more than plant cells when they are put in pure water
E. plant and animal cells expand the same amount when put in pure water
Which of the following statements best explains the results of this investigation?
A. cells absorb water to expand so as more water is added, the cells expand more
B. plant and animal cells have the same organelles, so they both expand the same amount
C. plants cells have cell wall that limit the amount they expand and animal cells do not
D. animal cells are more active than plant cells, so they expand more
Looking at the data, what dialysis tubing had the smallest percent change in mass?
Distilled Water
2% Sucrose
6% Sucrose
10% Sucrose
Looking at the data, what dialysis tubing had the greatest percent change in mass?
Distilled Water
2% Sucrose
6% Sucrose
10% Sucrose
Why did water enter the dialysis tubing with 10% sucrose?
A. There was a higher concentration of water inside the tubing and the water exited the tubing
B. There was a higher concentration of water outside the tubing and the water entered the tubing
C. There was a higher concentration of sucrose outside the tubing and the water exited the tubing
The student claimed that the rate of osmosis is determined by the concentation of sucrose on each side of the cell membrane. Which statement identifies the evidence that supports the claim?
A. the greater the sucrose concentration in the bad then the greater the % change
B. molecules only move when the sucrose concentration is above 5.00%
C. the change in mass indicates the movement of sucrose molecules
D. the distilled water in the beakers had the least change in mass
