We can separate an insoluble solid from a liquid using:

Which of the following are natural barriers to infection?
Ⅰ tears
Ⅱ skin
Ⅲ stomach acid
Ⅳ mucus

The units of specific latent heat are:

Which of the following characteristics MUST ALL formal groups possess?

1. Membership requirements
2. Code of conduct
3. Specific objectives
4. Elected leaders

Which of the following are all secondary sex characteristics in females?

You never find native magnesium because:

When we sweat, we lose heat because:

To make fertilisers and explosives we need:

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

Which of the following BEST characterizes a primary group?

Any solution with a pH below 7 must be:

All of these are properties of carbon monoxide EXCEPT for:

The lowest and the highest frequencies a typical young person′s ear can detect are approximately:

Which one of the following is the best way to measure growth of an organism?

A salt that is anhydrous contains no:

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

Which of the following routes taken by blood in the body is correct?

Ammonia gas spreads out faster than hydrogen chloride, showing that it is:

If x = 2³ × 5² =, then x⁴ =