The number of electrons in a full electron shell is:

The correct pathway of water through a plant is:

Which one of the following is NOT a function of the placenta?

Which of the following BRST describes the Organization of Eastern Caribbean States (O.E.C.S.)?

$x is divided among three boys, Ryan, Keith and Andrew, in the ratio 2 : 3 : 7, respectively. If Andrew gets $15 more than Keith, what is the value of x ?

The shaded area in the Venn diagram above represents

The interest rate on investments in a bank increased from 5 per cent per annum to 6 ¹/₂ per cent per annum. The difference in annual interest on a deposit of $4000 is

The scientific name of an organism is derived from its:

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

A certain nucleus has 12 protons and 16 neutrons.Which one of the following statements about the nucleus is NOT true?

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

She paid meticulous attention to her work as she attached the beads to the costume.

The point where two neurones connect is called:

In a simple reflex action:

The number of electrons shared in a single covalent bond is:

Which of the following can cross the placenta from mother to fetus?

__________ is a primary storage device that may be programmed and reprogrammed by the user.

Which one of the following would NOT give rise to a systematic error in an experiment?

A typical soil contains mineral particles, humus, water, air and:

Which of the relations represented below are functions?

The table shows the distribution of the ages of 25 students.

What is the probability that a student chosen at random is AT LEAST 13 years old?