Search over 10,000 free study notes

Arteries and veins are the "tubes" that carry blood around the body.Artieries have thick outer walls in order to cope with the blood passing through being under such high pressure generated by t...

When two populations of a species are isolated geographically (for example by a river, mountain, flood etc). The two populations adapt to different selection pressures and so then eventually evolve into t...

1. chromosomes are copied in the nucleus and condense into chromatids.2) the chromatids are pulled apart and move to opposite poles of the cell.3) the chromosomes separate.4) the cell divides5) 2 cells...

An action potential is generated within the axon of a neuron via a series of steps:1) the inside of the neuron at rest is negative (-70mV), called the resting potential2) Na ion channels open and inside o...

Camels are adapted to survive extremely dry conditions in deserts, where it is hot during the day and cold at night.They have the ability to go without water for long periods of time; their large humps al...