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3.4 An average adult’s heart pumps 540 litres of blood in one hour. If an adult’s total blood volume is 6 litres, how many times will this blood have to circulate around the body in an hour? (2)

The trade winds, a prevailing circulation pattern, have the flow of air ____________ the equator due to the ________ of air. 

  QUESTION 3     The graph shows blood pressure in vessels. Study the graph and answer the questions.   Right click on the button to open the diagrams in a new window.    

1.2 Choose the correct order that blood would flow from the arm to the lungs. (1)

A consumer eating  producer represents:

Mechanical types of beach renourishment include:

Scientific inquiry uses the scientific method process and requires peer review and replication for validation of scientific work.

In what phase do the chromatids separate?

The union of an egg and a sperm results in a __________ and its chromosome number is _________.

The exchange of genetic material between non sister chromatids is called: