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What is cytokinesis?

Cytokinesis is really just a fancy word for cell division. It is an important stage in both mitosis and meiosis that allows 2 new cells to be produced from 1. The way this is achieved is through the use of a...
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Answered by Divine A. • Biology tutor
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How does blood flow and oxygenation work in respect to the chambers of the heart?

Firstly, blood from the IVC (inferior vena cava), carrying deoxygenated blood from most of the body, after oxygen has been removed from the blood, diffused into the tissues and used for respiration, enters t...
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Answered by Dhruv P. • Biology tutor
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How does a heart beat happen?

Unlike other muscle cells in the human body, cardiac muscle is able to contract independently of the central nervous system. This is because it contains ‘pacemaker cells’ which are able to spontaneously gene...
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Answered by David O. • Biology tutor
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Explain a mechanism for the transporting and loading of sugars in the phloem. [6]

Relevant Points: Loading: loading into companion cells, location of companion cells at source(s), active loading of sucrose, mitochondrial action in companion cells, mechanism of proton gradient and co-trans...
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Answered by Humail M. • Biology tutor
4891 Views

Discuss the negative effects of smoking in the human body (6).

Smoking can cause carbon monoxide poisoning, meaning that carbon monoxide is carried in the blood via red blood cells instead of oxygen, leading to fatigue. Smoking can also cause lung cancer, as it contains...
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Answered by Samodani W. • Biology tutor
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