The metal used in food containers whose surface is protected by a strong oxide layer is:

In order to carry out photosynthesis, a plant needs:

Which of the following are examples of environmental variation in humans?
Ⅰ hair colour
Ⅱ height
Ⅲ intelligence
Ⅳ body mass

The units of specific latent heat are:

“ individual countries in the region are too small to make their presence felt on the world stage.”

Implied in this statement is the need for

Acid soils can be neutralised by adding:

Which of the following entries should be used to post Sales return?

How many lines of symmetry does this shape have?

All of these are carbohydrates EXCEPT for:

A student observed a plant cell through a microscope and made an accurate drawing of the cell. If her drawing was 80 mm in diameter and had a magnification of ×2000, what was the real diameter of the cell?

All of these are fractions from crude oil EXCEPT for:

The number of kilos in 1 metric tonne is:

Which of the following is a subset of {b, c, d}?

Water reabsorption is controlled by:

Particles are furthest apart in:

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 number of electrons shared in a single covalent bond is:

The number of double bonds in a molecule of carbon dioxide is:

In the Trading Account Returns Outwards is deducted from

If x = 2³ × 5² =, then x⁴ =