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Explain the differences between diffusion, osmosis and active transport.

Diffusion is the movement of particles (gases and liquids) from an area of high concentration to an area of low concentration. No energy is required (it is a passive process).Osmosis is the movement of water...
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Answered by Rikesh M. • Biology tutor
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Describe how the ancestors of modern lemurs may have evolved into the species shown in Figure 14. (June 2018, 5 marks)

The ancestors of modern Lemurs arrived in Madagascar and spread across the island. At some point after this, the once contiguous population became fragmented into three separate populations. Each of these po...
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Answered by Joseph B. • Biology tutor
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Describe the differences between Aerobic and Anaerobic respiration in animals.

Aerobic respirations occurs in the presence of oxygen, the products of which are water, carbon dioxide and energy. (glucose + oxygen -> carbon dioxide + water + energy)Anaerobic respiration doesn't use ox...
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Answered by Bilal R. • Biology tutor
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How are arteries adapted to carry blood away from the heart?

Since arteries need to pump blood to the entire body under high pressure, they are very strong with thick muscular walls. Artery walls are also elastic, which allows them to stretch and spring back in order ...
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Answered by Maxwell C. • Biology tutor
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What is the difference between a gene and a chromosome?

DNA is a long list of instructions which everyone has inside the nucleus of each of their cells. A section of DNA that has instructions to make a certain protein is called a gene . Now because DNA is so long...
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Answered by Saheefa I. • Biology tutor
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