A collection of several tissues which carry out a particular function is called:

A shopkeeper buys 48 radios for a wholesale price of $7200. At what price per radio must he sell to make a profit of 15% on his cost?

Items bought by a trader for $80 are sold for $100. The profit expressed as a percentage of cost price is

What is the value of u in the sequence 2 , 7 , 14 , 23 , 34 , u ?

A detector close to a sample of radioactive material records 76 counts per second (cps). Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the material is:

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

A reaction that gives out heat is said to be:

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

Absolute zero is:

What is the name of the interface used by visually impaired persons to operate a computer system?

Genetic engineering involves:

Which of the following is based on exploiting non-renewable natural resources?

Which one of the following is NOT an inherited disorder?

In electrolysis the anode is the:

A rectangular tank is 50 cm long, 50 cm wide and 10 cm deep. The volume of liquid it will hold is

How much simple interest is due on a loan of $120 for two years if the annual rate of interest is 5 ¹/₂ per cent?

If ƒ : x → x² + 1, then ƒ(-3) is

The group of elements whose molecules and atoms are the same is called:

All of the following can affect the size of a population EXCEPT for:

Which of the following accounts should prepared as the final account for non-trading organization?