January 1, 1999 a trader bought 100 articles at $5.00 each. During the month 70 Of the articles were sold at $8.00 each and the remainder were sold on January at the market value of $3.00 each. What was the gross for the month?

In the figure above, the shaded portion represents

For Mg++ to turn into an atom of magnesium metal it must:

Which one of the following gases is considerably heavier than air?

Which one of the following best describes hormones?

Nitrogen fixation produces:

Which of one the following statements about phloem cells is NOT true?

Vegetables like cauliflower, cabbage and broccoli have been bred from the original wild brassica plant by:

Oxygen is carried around the body by the:

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

The aim of the experiment shown above was to find out if:

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?

A square has the same area as a rectangle with sides of length 4 centimetres and 25 centimetres. What is the length of the square?

When a trial balance does NOT agree, the difference is placed in a

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

To make car bodies we use:

To remove limescale from a tap you need:

The common name for ascorbic acid is:

The blood cells that engulf invading microorganisms are:

Which of the following would play an important part in a government′s efforts to increase consumption of locally produced food?