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Explain the three stages of drug testing.

First, drugs are tested on human cells and tissues, it is then tested on two different mammals. The final stage has two parts, the drug is initially tested on healthy human volunteers and they are given incr...
YA
Answered by Yasmin A. • Biology tutor
3418 Views

How would you investigate the effect of light intensity on the rate of photosynthesis in pondweed? [6]

Apparatus is set up by first adding the pondweed to a beaker filled with water. The beaker has been sealed and any gas produced by will be collected by a syringe. Light will be provided by a lamp and its lig...
BS
Answered by boland S. • Biology tutor
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What is the difference between POR and PARA

Por and Para are both used to replace words such as 'for' 'by' or 'through'. Por Por is used to talk about movement, modes of transport and communication, exchanges, time duration and motivation/ reasons beh...
JM
2503 Views

How does Priestly use the theme of inspection in An Inspector Calls?

Priestly utilises the theme of inspection in An Inspector Calls to conjure the consciences of the characters and invoke a sense of guilt. Priestly's play centres around the idea of inspection and interrogati...
MJ
Answered by Megan J. • English tutor
13997 Views

A triangle has sides of length 8 cm, 10 cm and 14 cm. Work out the size of the largest angle of the triangle. Give your answer correct to 1 decimal place.

Utilising the cosine rule: c² = a² + b² - 2abcosC, substitute in the given lengths. We therefore get that 14² = 10² + 8² − 2 × 10 × 8 × cosA . Expanding this expression we then get that 196 = 164 - 160cosA. ...
JK
Answered by Josephine K. • Maths tutor
19757 Views