The following diagram shows a model used to show how breathing movements take place:

Which part of the model represents the diaphragm?

Which one of the following taxonomic groups contains the greatest number of organisms?

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

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

Single-celled organisms do not need a transport system because:

Which of the following BEST characterizes a primary group?

A __________ is a sub-division of a track that stores data on a disk.

Which one of the following statements about an ammeter is NOT true?

The active catalyst in a car′s catalytic converter is:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

The headgear worn by the factory worker is made from artificial material.

Which of the following describes real accounts?

In the modern Periodic Table the elements are arranged:

An example of an air pollutant is:

Osmosis is:

Which of the following are advantages of asexual reproduction in a flowering plant?
Ⅰ Large numbers of offspring are rapidly produced.
Ⅱ Favourable genotypes are maintained from one generation to the next.
Ⅲ The plant does not need to rely on wind or insects for pollination.
Ⅳ Several identical individuals grow close together.

The gross profit of a firm is $3,600, bad debts $100, rent paid $120, rent prepaid $20, general expenses $80 and discount received $110. The net profit is

Measuring plant growth by measuring height is convenient, but inaccurate because:

In an airport, a system consisting of sensors, bar code readers and remote controls is MOST LIKELY used for __________.

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

When we sweat, we lose heat because: