Vaccination causes a person′s immune system to produce:

What is the simple interest earned on $10 000 invested for 3 months at a rate of 5% per annum?

All of the following items are widely used input devices EXCEPT the __________.

The introduction of machines in agriculture results in the unemployment or farm workers.

The type of unemployment these workers suffer is

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

Identify the order in which the ancestors of the Caribbean people arrived in the region.

1. Amerindians
2. East Indians
3. Europeans
4. Africans

A man bought a shirt at a sale. He saves $30 on the normal price when he paid $120 for the shirt. What was the percentage discount on the shirt?

Which one of the following lists only differences between aerobic respiration and anaerobic respiration?

A flame test colour of red could indicate the presence of a compound of:

The mean of ten numbers is 58. If one of the numbers is 40, what is the mean of the other nine?

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

A shopkeeper buys 24 CD players for a wholesale price of $1800. At what price per CD player must she sell to make a profit of 10% on her cost?

Which of the following is NOT a prime number?

Reactive metals such as potassium react with water to give hydrogen and:

Which of the following would DISCOURAGE emigration?

THE ITEM refer to the following dialogue.

Sita: When Marvin was group leader he was always ordering us about.

Paul: Me, I prefer a group leader who allows members to do as they please.

Paul′s statement indicates that he prefers a leader with a style that is

All gas exchange surfaces in vertebrate animals have:

In a plant, water and dissolved minerals are transported in the:

All of the following have a charge of -1 EXCEPT for:

In a school of 910 pupils, ³/₇ are boys and ²/₅ of the boys wear glasses. How many boys wear glasses?