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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...

In Spanish there are two different verbs for the verb "to be" in English, Ser and Estar. The two are not interchangeable, as they have two different uses. We use the verb ser when we are describ...

Momentum of an object is the product of its mass and velocity (p=m x v). Since mass is a scalar quantity and velocity is a vector quantity, we can derive that momentum must therefore be a vector quantity ...

<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...