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Explain how antibiotic resistance can be developed by bacterial populations.

Within the initial population of bacteria, some will have an allele that provides them with resistance to a specific antibiotic which is due to mutations, random spontaneous changes in the base sequence of D...
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Define the term osmosis

Osmosis is the movement of water particles from an area of high concentration to an area of low concentration through a partially permeable membrane along a concentration gradient.
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Answered by Alice D. • Biology tutor
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State the function of the enzyme lactase

Break down the disaccharide lactose to the monosaccharides glucose and galactose.
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There are many specialised cells in the body which have developed from embryonic stem cells. What is the name used to describe this process? Go on to describe how this process may occur.

Process - Differentiation. Explanation - The only genes which are expressed in the cell are those which are characteristic to that cell type.
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Answered by Rory B. • Biology tutor
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What is the difference between an Alkane and Alkene?

Both alkanes and alkenes are examples of hydrocarbons, which mean they are made up of hydrogen and carbon only.Alkanes however are 'saturated' and have no double bonds between the carbon atoms.Alkenes on the...
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Answered by Ellie T. • Biology tutor
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