Tooth decay can be caused by:

Cells become specialised to carry out different roles.This process is called:

Which of the following documents may be used to inform a customer of an undercharge on an invoice?

Plant stems grow towards a light source.This is an example of:

The wall of the heart is made of:

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

Mrs. Green is a dry goods merchant. Which of the following transactions would result in a debit to her Cash Account?

The perimeter of a rectangle is 26 cm. The rectangle is converted to a square by tripling the width and taking a quarter of the length. What is the perimeter of the resulting square?

The only one of the following which is NOT a change of state is:

In order to carry out photosynthesis, a plant needs:

The following statements refer to the laminated core of a transformer. Which one of them is NOT true?

The simplest ratio of atoms in a compound is given by the:

in which of the following accounts is debenture interest charged as an expense?

All of these elements form allotropes EXCEPT for:

To electrolyse solid lead bromide it must first be heated so that:

A detector close to a sample of radioactive material records 76 counts per second (cps). Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the material is:

In electrolysis the anode is the:

Cooking food improves all of these EXCEPT for:

Which of the following words BEST describes a quadrilateral with all its sides equal?

In a box, there are 3 white, 4 red and 2 blue marbles. What is the probability that a marble taken at random is NOT blue?