Top answers

What is the difference between active transport and diffusion.

Diffusion is the passive (does not require energy input) movement of a substance down a concentration gradient from an area of high concentration to an area of low concentration . Eg how the colour and flavo...
NG
Answered by Nicholas G. • Biology tutor
10387 Views

Calculate the percentage of Copper in Copper oxide (CuO, Mr=80). (3 marks)

Ar of Cu = 64 (1 mark) Percentage of copper in CuO = 64/80 x100 (1 Mark) Percentage of copper in CuO = 80% (1 mark)
KD
Answered by Katie D. • Chemistry tutor
24958 Views

Describe how a sperm cell is adapted to its role (4 marks).

The role of a sperm cell is to fertilise an egg cell and pass on genetic material. The nucleus of the sperm cell contains the male genetic material/DNA. The head of the sperm cell contains many mitochondria ...
KD
Answered by Katie D. • Biology tutor
12497 Views

Where should I start when answering a question that involves an extract from the text?

Before even getting to the question, have a read through of the extract to make sure you fully understand what is happening at this point in the text. Then look at the question and highlight the key theme or...
TD
4868 Views

How do I find the equation of a line between two points?

The equation of a line is written in the form y=mx+c where m is the gradient of the line and c is the y-intercept. These are the two values that we will need to calculate.For example, lets take the two point...
LR
Answered by Lucille R. • Maths tutor
4303 Views