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Describe the key features of a velocity-time graph?

A velocity-time graph shows the speed and direction an object travels over a specific period of time. Velocity-time graphs are also called speed-time graphs. The vertical axis of a velocity-time graph is ...

Answered by Alexandria G. • Biology tutor

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Define a gene

The basic unit of genetic material inherited from our parents - it is a short section of DNA.

Answered by Alexandria G. • Biology tutor

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Describe the measures the body takes to achieve homeostasis in response to temperature changes

The body is able to utilise a number of measures in order to maintain an optimum body temperature of around 37 degrees celsius. Firstly, capillaries close to the skin surface are able to vasodilate (expan...

Answered by Adam B. • Biology tutor

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Describe the synaptic transmission of a nerve impulse at the neuromuscular junction

As an action potential arrives at the presynaptic terminal, a depolarisation of the motor neuron membrane occurs which initiates the opening of voltage-gated Ca²⁺ion channels - releasing Ca

Answered by Adam B. • Biology tutor

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What are Stem Cells?

Stem cells are (pluripotent) undifferentiated cells that can differentiate into specialised cell types / tissues. Future medical uses involve growing organs from a patients OWN stem cells = zero chance of...

Answered by Sophie P. • Biology tutor

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