Top answers

What is a nephron?

Nephrons are units of the kidney which are specially adapted for filtration and reabsorption of substances in the blood. Each nephron is composed of different various parts which have specific roles. These p...
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Answered by Laetitia H. • Biology tutor
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Why do bacteria become resistant to antibiotics?

Antiobiotics kill bacteria but bacteria can become resistant to antibiotics. This happens through a process called natural selection. Within a group/population of bacteria they will all have small difference...
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Answered by Lysander G. • Biology tutor
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What cell part is always present in plant cells but never in animal cells?

Cell wall
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Answered by Catherine W. • Biology tutor
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Give the name, the function and one adaptation of a specialized cell of your choice.

Examples 1. Epithelial cells clear airways and have cilia which beat back and forth to move bacteria. 2. Red blood cells carry oxygen and have no nucleus so they have a larger surface area in which to carry ...
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Answered by Catherine W. • Biology tutor
3987 Views

What are the structural and functional differences between arteries and veins?

Structural Differences 1. Arteries have a much thicker wall to withstand the high pressure of blood flowing in them, whereas veins have a thinner wall so that they can be pressed flat against adjacent muscle...
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Answered by Iro C. • Biology tutor
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