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We can break down the process of natural selection into a few steps: genetic variation within a population, a selective pressure which favours a particular trait, increased survival and therefore reproduc...

<p>There are two types of respiration that you need to know about - aerobic and anaerobic respiration. The main difference between the two types of respiration depend on whether oxygen is available ...

Phagocytosis begins when white cells called phagocytes recognise bacteria invading the body (pathogens). The cell membrane of one of these phagocytes then fuses around a single bacterium, engulfing it wit...

Mitosis is used for growth, repair and asexual reproduction whereas meiosis results in the production of gametes needed for sexual reproduction. Mitosis creates 2 cells with diploid chromosomes but meiosi...

A process by which organisms which are most suited to the environment that they live in are more likely to survive and therefore to reproduce, passing the characteristics which made them most suitable on ...