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:

The nucleus of a carbon atom has six protons and eight neutrons.Which one of the following describes it?

The marked price of a bicycle was $260. A man bought the bicycle on hire-purchase by making a down payment of $100, and twelve monthly payments of $16 each. How much could he have saved if he had bought the bicycle for the marked price?

Plants make growth movements in response to all of the following stimuli EXCEPT for:

The only one of the following which is NOT a change of state is:

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?

The major plant nutrients written as NPK refer to phosphorus, nitrogen and:

To make cell walls, plants must have:

Which of the following device interfaces integrates the device controller into the disk or CD drive?

The only common gas that turns moist red litmus paper blue is:

Another name for authorised capital is

Transition metals have all of these properties EXCEPT for:

The charge on a sodium ion is always:

Ammonia gas spreads out faster than hydrogen chloride, showing that it is:

A contractor completed five-ninths of a job before a second contractor completed an additional one-third. What fraction of the job is left undone?

$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 following are all features of insect-pollinated flowers EXCEPT for:

To work out the heat change in a reaction we need to know just three things, the mass, the temperature change and the:

Osmosis is:

The site of reabsorption of MOST of the water from the filtrate.