Which of the following sets has a finite number of members?

Most plant and animal cells contain:

When aluminium is extracted by electrolysis, cryolite is added to:

All of the following processes result in energy loss from an ecosystem EXCEPT for:

When a person who has diabetes injects himself with insulin it:

A political campaign is a method used by political parties to

The two main protein groups are globular and:

Which of the following is NOT a way in which infectious diseases can be transmitted?

Hydrocarbons contain carbon and:

Which one of the following is NOT a function of the placenta?

In a partnership maintaining fixed capital accounts, the net profit is appropriated to the

Which of the following may result if many people do what the young man in the picture is doing?

1. The rapid growth of cities
2. The growth of shanty towns and squatter settlements
3. The brain drain experienced by many developing countries
4. Inadequate housing, educational and health facilities in urban areas

Acid soils can be neutralised by adding:

Which of the following statements is true?

The number of double bonds in a molecule of carbon dioxide is:

All gas exchange surfaces in vertebrate animals have:

Which one of the following best describes hormones?

The number of atoms in a diatomic molecule is:

What is the BEST option available to persons who are qualified but cannot find a job?

Urea is made from surplus proteins in: