The bacterium Vibrio cholerae that causes the disease cholera acts on the cells of the intestinal wall. It causes chloride ions to move out of the cells into the small intestine. Which process will then lead to the production of dangerously high amounts of watery diarrhoea?

Which processes are responsible for the uptake of ions from the soil by a plant and the uptake of glucose into the vi…

The element nitrogen is needed to form

In a practical lesson, a student makes the following observations about some organisms. 'They are spherical, unicellu…

Which process does not require energy?

In a kidney machine, protein molecules are not lost from the blood. How is loss of protein prevented?

What happens when the body temperature of a human is controlled?