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Why do organs need to be 'matched'?

The antigens present on the cell surface membranes of organs are different from person to person due to genetic variation (leading to protein tertiary structure variation - remember antigens are proteins and...
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Answered by Frances E. • Biology tutor
2846 Views

¿Hasta qué punto considera usted que los medios de comunicación afectan a los gobiernos? Comente.

Creo que los medios de comunicación afectan los gobiernos de una manera inmensurable. En las elecciones de 2016 en los estados unidos, los dos más grandes candidatos tienes problemas con medios de comunicaci...
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Answered by Megan M. • Spanish tutor
1909 Views

In a fish and chips shop, the potatoes are cut hours before they are cooked, but they must not dry out. To stop this, the owner soaks them in a salt solution. Define the process of osmosis and explain what would happen if you used distilled water.

Osmosis can be described as the movement of water from a high concentration to a low concentration through a semi permeable membrane.In this example the salt solution has roughly the same concentration of wa...
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Answered by Vikram S. • Biology tutor
7523 Views

Differentiate the function y=4sqrt(x)

Can re-write function as y=4x 1/2 Then follow the standard steps for differentiating a power. Take the 1/2 down and multiply by the number in front of the x, in this case 4, to give 2. Now reduce the power w...
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Answered by Calum W. • Maths tutor
3823 Views

In ‘Of Mice and Men’, how does Steinbeck present women?

Steinbeck presents women very negatively within his novella ‘Of Mice and Men’ through his usage of his only female protagonist, Curly’s wife. She isn’t even given a name and the only title she has indicates ...
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