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1. The action potential runs along the presynaptic membrane in a wave of depolarisation and activates the Voltage Gated Calcium ion channels. 2) Once these channels open, Ca2+ diffuses into the presyna...

Prep

Animal and plant cells have some characteristics in common, as when life first evolved on earth, we shared a common ancestor. This was a long time ago: 1.6 Billion years!!!
This is w...

25%. Draw a punnet square to find this:

Write in the alleles for the parents along the top and side of the square, then match up the possible allele combinations for the children inside the square....

DNA mutations happen randomly during division by mitosis. Some of these mutations code for antibiotic resistance. When a bacterial colony is exposed to antibiotics most bacteria without the resistance mut...