During adolescence, boys:

A reaction that gives out heat is said to be:

In hot conditions the surface blood vessels in the skin undergo vasodilation. This allows:

A dynamo connected to a circuit is being turned.Which one of the following would NOT generate a greater e.m.f.?

The charge on a sodium ion is always:

Which of the following does NOT play a role in evolutionary change?

Which of the following statements about photosynthesis is NOT true?

The part of the brain that processes information from the sense organs is the:

In the Trading Account Returns Outwards is deducted from

The gas that relights a glowing splint is:

Two separate forces are acting on a bar to cause it to rotate clockwise. One force is 20 N, at a distance of 3 m out from the pivot; the second force, 2 m further out, is 10 N. Their combined moment is:

The density of pure water is:

Caribbean governments have improved the rights of children born out of wedlock by.

When an acid neutralises an alkali the pH is likely to be:

In the Venn diagram above, the shaded portion represents

A man's regular pay is $3 per hour up to 40 hours. Overtime is twice the payment for regular time. If he was paid $168, how many hours overtime did he work?

Three lights flash at intervals of 4, 6 and 10 seconds respectively. They are started together. How soon after will they next flash together again?

The area of the trapezium ABCD above is

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

In pea plant size, tall is dominant to dwarf.You cannot tell whether a tall plant is homozygous (TT) or heterozygous (Tt).To find its genotype you perform a test cross.This involves: