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Define osmosis.

Osmosis is the net movement of free water molecules from an area of high er water potential to an area of low er water potential through a partially permeable membrane . Water potential = a measure of the nu...
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Answered by Archie A. • Biology tutor
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Describe the similarities and differences between animal and plant cells and the function of each component found in them.

An animals cell contains a cell membrane, nucleus, mitochondria, cytoplasm and ribosomes. A plant cell contains all of these components as well as a cell wall, chloroplasts and a vacuole. A cell membrane is ...
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Answered by Isobel B. • Biology tutor
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(a) Name the organs which produce each of the following hormones. Choose from this list. ovaries brain liver stomach pancreas testes kidney (i) testosterone. (1 mark, 1 li

(a) (i) testes; (ii) pancreas; (iii) ovaries; (b) in the blood; (c) (i) insulin; (ii) contains glucose/sugar;
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Answered by Niko M. • Biology tutor
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How do we pick up maximum marks in each question?

The first thing you should be doing when you read a question is to make sure that you understand exactly what it is asking from you for which subject knowledge is extremely important. Underlining or highligh...
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Answered by Amaarah H. • Biology tutor
6583 Views

Describe the process of natural selection.

Within any population, there is naturally variation between organisms because they all have differences in their genes. The organisms that are best suited to the environment that they live within are most li...
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Answered by Ollie A. • Biology tutor
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