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Due to random mutations occurring in bacterial DNA during replication of bacteria, a new strain of resistant bacteria is formed, which is capable of breaking down the antibiotic, so the infection is not c...

First step in answering this question is to read it carefully and determine what exactly is being asked:-we are being asked to give the reasons for the effect of 'pH change' only, not any other factors, s...

Auxin is a growth hormone in that is found in plants. When it is released, it causes the affected cells to elongate. Auxin is released along the shaded side of the plant, at the shoot tip. This causes the...

The membrane of an axon consists of three main protein channels: the sodium/potassium pumps, voltage-gated sodium channels and voltage-gated potassium channels. These play a role in establishing the membr...

Depolarisation of plasma membrane opens voltage-gated calcium channels, allowing calcium ions to move into pre-synaptic bulb down the concentration gradientHigh intracellular calcium results in the mobili...