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Use your knowledge of Water Potential applied to the GIT to describe what can cause or prevent Constipation

Water Potential is the measure of the ability of water molecules to move freely in solution. A solution of pure water where there is no solute and all of the water molecules are free to move, the water poten...
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Answered by Teresa M. • Biology tutor
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What are the steps in semi-conservative DNA replication?

Initially, the DNA is present in the form of a double helix, comprising 2 polynucleotide strands joined by hydrogen bonds between complementary bases. The enzyme helicase unwinds and separates the 2 strands ...
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Answered by Hannah P. • Biology tutor
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What is active transport?

This is a form of movement of molecules. This is the movement of molecules from an area of low concentration to an area of high concentration (against the concentration gradient) across a membrane. As it is ...
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Answered by Zimeng W. • Biology tutor
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Meiosis and mitosis are different types of division in human cells. Compare the two processes by referring to where each takes place and the kind of products that are made.

Meiosis is a mechanism of sexual cell division used to generate gametes, or sex cells, in reproductive organs. For example, generation of eggs in ovaries. By contrast, mitosis is an asexual method of cell di...
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Answered by Megan C. • Biology tutor
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How do electrical impulses control the regular beating of the heart?

The electrical beating of the heart is controlled by the cardiovascular control centre located within the medulla oblongata within the brain. Heart rate is controlled by the frequency of impulses being sent ...
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Answered by William G. • Biology tutor
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