Search our library of homework questions

Top answers

All subjects

All levels

Describe how a sperm cell is adapted for it's function. (4 marks)

1 mark each for one of the following:
Describe the sperm cell's function; i.e. fertilising the egg
(Proportionally large) flagellum for mobility
Possess an Acrosome filled with enzymes to p...

Answered by Jack M. • Biology tutor

3021 Views

How would I plan an answer to this question: 'Peaceful co-existence failed by 1961 because neither the East nor the West fully committed to it. How valid is this assessment?' (AQA History A-Level)

The first thing to do when planning an essay is to identify the most important words in the question, and consider what they mean. This will ensure that you are really answering the question directly rath...

Answered by Isobel B. • History tutor

6075 Views

Explain how the cardiac muscle controls the regular beating of the heart.

Cardiac muscle is myogenic. This means signals for contraction and relaxation originate from the heart itself. The process is initiated in the sinoatrial node (SAN), located in the right atrium. The SAN i...

Answered by Christie J. • Biology tutor

3620 Views

Explain the transmission of a nerve impulse across a cholinergic synapse referring to action potentials. (6)

When an action potential reaches the terminal of a pre-synaptic cleft, voltage-gated calcium channels are stimulated to open, causing an influx of Ca+ ions in the pre-synaptic neuron. This infux of Ca+ io...

Answered by Sarah W. • Biology tutor

2654 Views

Work out the price elasticity of demand of Coca Cola when the demand rises from 1 million to 2 million following a price decrease of £1.50 to £1.35. Is this price elastic or price inelastic?

Price elasticity of demand = % change in quantity demanded / % change in price
PED = ((2m - 1m)/1m x100) / ((1.35-1.5)/1.5 x100)
PED = 100/-10PED= -10
it is price elastic since PED < -...

Answered by Nandini M. • Economics tutor

3672 Views