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Explain how xylem vessels are adapted to carry out their functions in plants. 4 marks

Xylem cells have no cytoplasm or end walls, meaning they form a tube through which water can pass freely to allow water transport. Lignin strengthens the cell walls, helping to support the plant.
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Answered by Tilly H. • Biology tutor
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Briefly describe the process of mitosis.

Prophase: The chromosomes condense and the nuclear envelope breaks down. Centrioles move to opposites ends of the cell, forming the mitotic spindle. Metaphase: Chromosomes line up at the equator of the cell ...
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Answered by Sasha P. • Biology tutor
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Describe two ways the healthy artery is different from the artery affected by coronary heart disease.

The healthy artery has more blood flowing through it as there are no fatty deposits on the inner walls.
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Answered by Maria S. • Biology tutor
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Q: Give 2 advantages of using stents over CABG for coronary heart disease.

Less invasive, not as big an operation, therefore there is less risk involved.Shorter recovery time, and so patient spends less time in hospital.Could also be: Doesn't need to use general anaesthetic. Less s...
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Answered by Maria S. • Biology tutor
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Describe the process of diffusion with an example.

Diffusion is the moving of solutes from a region of higher solute concentration to a region of low solute concentration. It does not require energy so we say it is a “passive process” and it can occur it all...
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