Which one of the following structures is responsible for controlling entry and exit of materials into and out of the cell?

In an endothermic reaction:

In the modern Periodic Table the elements are arranged:

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?

Tooth decay can be caused by:

In hot conditions the surface blood vessels in the skin undergo vasodilation. This allows:

All of the following are components of an ecosystem EXCEPT for:

A __________ is the smallest addressable unit on a disk

The number of particles in a mole of any gas is always:

The value of 5 in the number 357.21 is

Which one of the following foods contains the most energy per 100 g?

Which of the following transactions will NOT affect capital?

The Item refer to the information below The following scores were obtained by eleven footballers in a goal-shoot competition:

The modal score was

Hydrocarbons contain carbon and:

Candied fruits are preserved in a strong solution of:

Which one of the following statements about a voltmeter is NOT true?

Which of the following statements is true?

Which of the following may result if many people do what the young man in the picture is doing?

1. The rapid growth of cities
2. The growth of shanty towns and squatter settlements
3. The brain drain experienced by many developing countries
4. Inadequate housing, educational and health facilities in urban areas

Alcohol can be made by fermentation of all these EXCEPT for:

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