Top answers

What is a gene?

A section of DNA in a chromosome, that codes for the production of a specific protein. Genes have different alleles that provide variation.
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Answered by Tanisha P. • Biology tutor
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Define the term "stem cell".

A stem cell is an undifferentiated cell, that has the potential to become a specialised cell.
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Answered by Tanisha P. • Biology tutor
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How do the properties of water explain its vitality in living organisms?

First, let's talk about the components of water. Water molecules are made of two hydrogen and one oxygen atom bonded together covalently, like many other molecules. However, water is extremely special becaus...
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Answered by Adedayo S. • Biology tutor
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What are the different ways in which substances can move across cell membranes?

Passive transport Diffusion = occurs in gases or aqueous solutions whereby particles are free to move and spread from a higher concentration to a lower concentration. An example is air freshener being spraye...
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Answered by Alisha R. • Biology tutor
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How does energy move through a food chain?

In most food chains, all of the energy which is used originally comes from the sun. Plants are "photoautotrophs", which means that they can use light energy from the sun to fuel their life processe...
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Answered by Daniel M. • Biology tutor
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