Which one of the following taxonomic groups contains the greatest number of organisms?

AIDS is a killer disease because:

A __________ is a device that is externally connected to and under the control of the central processing unit.

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

Instruction: Choose from the four options the word or pair of words which BEST completes the meaning of the sentence.

When parents display a ............ for one child, the others are likely to feel ............

The only common gas that turns moist red litmus paper blue is:

The following statements describe an ordinary mercury-in-glass laboratory thermometer. Which one of them is NOT true?

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

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?

If x = 2 and y = -1, then 3x - 5y / xy²

The shaded area in the Venn diagram above represents

All of these reactions are exothermic EXCEPT for:

When zinc metal is added to copper sulphate solution the products are copper and zinc sulphate solution, so the material that has been displaced must be:

Which of the following is a prime number?

Decomposers are important in the process of decay because:

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

A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has:

The catalyst in the Haber Process is:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

She paid meticulous attention to her work as she attached the beads to the costume.

Quantity of electricity in coulombs = current in amps multiplied by: