RP3 Flashcards
1
Q
Water potential of pure water
A
0 kPa
2
Q
What does a more negative water potential mean
A
Higher tendency for water to move into.
3
Q
Why is giving your results as a ratio / percentage change
A
Comparison can be made as there is different starting mass
4
Q
How does evaporation affect water potential of solutions
A
Decreases water potential
5
Q
Why use the potato cylinders from the same potato
A
They have the same potential so there are no genetic differences
6
Q
Why is potato skin removed from cylinders?
A
Potato skin is impermeable to water,
Potato skin is a different tissue.
7
Q
Why percentage increase of a small cube is greater than percentage increase of large cube
A
Due to large surface area to volume ratio for osmosis
