Over a million students use our free study notes to help them with their homework
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,...
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...
A reflex action is an automatic rapid involuntary response, which acts to protect the body from damage. Such as when you touch something extremely hot, you involuntarily remove your hand from the hot o...
An enzyme is known as a biological catalyst. This is because they can speed up reactions by providing an alternative pathway, lowering the activation energy of the reaction. They are normally composed ...
Background knowledge
DNA - carry the genetic code that determines characteristics of an organism
Chromosomes - made...
←
877
878
879
880
881
→
Internet Safety
Payment Security
Cyber
Essentials
