The mass of a cube of fresh potato is found. It is then placed in a test-tube containing a dilute solution of sucrose. After an hour, its mass has increased. Which process has occurred and what has happened to the concentration of the sucrose in the solution in the test-tube?

Which processes can only occur through a membrane?

Which organelles are found in both animal and plant cells? 1 cell membrane 2 cell wall 3 nucleus 4 sap vacuole

Describe the differences in structure and function between a cell wall and a cell membrane.

Which method of control would not be effective against the spread of the malarial parasite?

Which disease is first recognised by painless ulcers which can be anywhere on the body?

In the female reproductive cycle, which sequence of events could occur in 28 days?