In order to carry out photosynthesis, a plant needs:

Which one of the following statements about constructive interference is NOT true?

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

An insoluble metal oxide can be described as:

If closing stock Were overstated by $1,000 at the end of a trading period, the error would result in an

The exterior angles and the interior angles of a polygon are equal. How many sides does the polygon have?

The correct equation for photosynthesis is:

When a metal wire carries an electric current, charges flow through it.The moving charges are:

Which of the following nutrients is/are digested in the stomach?

Any solution with a pH below 7 must be:

Vaccination causes a person′s immune system to produce:

The following are all features of insect-pollinated flowers EXCEPT for:

A certain nucleus has 12 protons and 16 neutrons.Which one of the following statements about the nucleus is NOT true?

All of the following are possible consequences of global warming EXCEPT for:

Items bought by a trader for $80 are sold for $100. The profit expressed as a percentage of cost price is

The optimum pH for most enzyme action is:

Two resistors, one of 4 Ω and one of 6 Ω, are connected in parallel.Their combined resistance is:

Which of the following BEST characterizes a primary group?

How much simple interest is due on a loan of $240 for two years if the annual rate of interest is 4 per cent?

A cell in an embryo divides by mitosis three times in succession. How many cells will be formed from these divisions?