Which of the following properties of water is not important to the survival of living things?

A relationship between two organisms where one organism derives benefits from the relationship and the other organism derives no benefit, but is not harmed, is called:

Which one of the following best compares the eye and a camera?

In a food chain a plant is a producer because it produces:

The type of bonding that involves loss or gain of electrons is called:

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

The sharp-tasting compound in vinegar is:

Decomposers are important in the process of decay because:

All of these are properties of carbon monoxide EXCEPT for:

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

To conceal his true activities, the spy quickly ............ a plausible excuse for his presence there.

The ZAP Company hired you as a book-keeper. On April 3 you received an invoice along with goods from D. Kamin & Co. Ltd. for $600. Where should you record this transaction?

When zinc sulphide is heated in air the gas produced is:

Plant stems grow towards a light source.This is an example of:

Two commonly used types of impact printers are __________.

In terms of mass, compared to a proton, an electron:

All of these are compounds EXCEPT for:

The sizes of the interior angles of a polygon are x°, 2x°, 60°, 3x° and 36°. What is the value of x ?

When aluminium is extracted by electrolysis, cryolite is added to:

The density of seawater is:

8x - 4(x - 5) =