Top answers

Biology
A Level

What is the difference between diffusion and osmosis?

Osmosis is the movement of solvent particles (usually referring to water) from an area of low concentration (i.e. lots of water particles) to and area of high concentration (i.e. less water particles a...

KM
Answered by Kaat M. Biology tutor
8001 Views

What are the functions of the Kidneys?

It is the kidneys job to filter the blood and remove waste products.

The kidneys are made of functional units call nephrons of which there around a million per human kidney. In the renal ...

EA
Answered by Elizabeth A. Biology tutor
4705 Views

In what ways have human activities contributed to global warming?

With this question it is important to focus on the human contribution to global warming rather than explaining why global warming is happening. 

Start your answer by explaining that carbo...

KM
Answered by Kaat M. Biology tutor
6490 Views

What is a mutation and what are the consequences of one?

A mutation is a change in the genetic composition of the DNA. It is often caused by an accidental insertion, deletion or swapping of a single base however whole genes can also move.

SNPs,...

LM
Answered by Liam M. Biology tutor
4179 Views

How does air enter the lungs for inspiration? What does the body do to make this happen?

Intercostal muscles and the diapragm contract, which causes the ribs to move upwards and outwards. This increases the volume of the thorax, therefore lowering the pressure within the lungs. The pressur...

IR
Answered by Isobel R. Biology tutor
5934 Views

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