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How are root hair cells specialised to carry out their function?

The role of root hair cells is to absorb water and mineral ions. Therefore they have a large surface area to increase the rate of water absorption. Root hair cells also have a large amount of mitochondria wh...
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Answered by Iona M. • Biology tutor
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Compare a eukaryotic cell with a prokaryotic cell

Both the eukaryotic and prokaryotic cells have a cell surface membrane and contain cytoplasm and ribosomes. However, eukaryotic cells contain membrane bound organelles, such as mitochondria, nuclei, endoplas...
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Answered by Rebecca O. • Biology tutor
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describe the structure of the cardiovascular system, considering causes, resulting outcomes and treatment of coronary heart disease (CHD)

describe and visualise heart and CVS structure to begin to understand the underpinning principles of the heart, arteries and veins. build upon these principles with regard to coronary heart disease and the p...
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Answered by Raffaele M. • Biology tutor
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Before a cell divides during the process of mitosis, it must duplicate its DNA. Describe the process of DNA replication.

DNA helicase breaks the hydrogen bonds between the two strands of the DNA helix, separating them. Each strand can then act as a template for the synthesis of new DNA. Free nucleotides can then attach to the ...
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Answered by Jen C. • Biology tutor
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Describe the process of ventilation in humans. (4 marks)

During inhalation, the intercostal muscles contract causing the rib cage to move up and out. The diaphragm also contracts and flattens. This causes the thorax to expand, increasing the volume and decreasing ...
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Answered by Ella C. • Biology tutor
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