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Stem cells tend to have two distinct characteristics that set them apart from all other cell types.
1) They are able to grow indefinitely in defined media unlike somatic cells which ...

Why AOs matter: AOs stand for Assessment Objectives and they let you know how you will be assessed in your english literature exam. No matter what exam board you are doing, the same AOs a...

Firstly, let's start off with the simplest type of bonding. Ionic bonding involves the transfer of electrons, usually from a metal (Sodium/Na) to a non-metal (Chlorine, Cl). This creates an attraction bet...

The sin rule is used when you need to find a length of a side or an angle. You use the sin rule when you're given an angle, an opposite side length and also an angle or side length opposite to the one you...

x² - 9 = 4x + 12 x² - 9 - 4x = 12 x² - 9 - 4x -12 = 0 x² - 4x -21 = 0 Factorise into form (x + ?)(x + ?) Factors of -21 ar...