- Life Sciences
this muscle 'closes' or bends the joint when it contracts (so the angle between the bones decreases).
a molecule that is formed when oxygen and haemoglobin combine chemically.
an abnormal response of the immune system to the protein in certain foods.
energy resources such as coal and oil, which are being used up much more quickly than they can...
a graphical representation of the evolutionary relationship between taxonomic groups based on...