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Describe the process of natural selection

A mutation occurs in the genotype of an organism. This results in a beneficial phenotype being expressed. This organism now has a survival advantage. Therefore, it will live longer. This means it will have m...
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Answered by Katherine O. • Biology tutor
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Describe the process of DNA replication

DNA replication is semi-conservative, meaning existing strands are used as templates for new strands. The DNA is separated (unwinds) by the enzyme helicase. This enzyme breaks the H bonds between nucleotides...
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Answered by Katherine O. • Biology tutor
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What is the role of oxygen in the electron transport chain, and why is it so essential?

Oxygen acts as the final electron acceptor in the electron transfer chain, resulting in the formation of H 2 O. This is essential because without it, the electron transfer chain cannot function resulting in ...
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Answered by Ben W. • Biology tutor
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Describe the key features of an exchange surface

exchange surfaces require a small diffusion distance enabling the fast exchange of compounds, good blood supply to maintain a concentration gradient. This allows for the most efficient diffusion
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Answered by Zoe S. • Biology tutor
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What are the differences between DNA replication and mRNA transcription?

The major difference between both of these processes is why they are used, DNA replication is used for cell division in the S phase of the cell cycle. mRNA transcription is used in protein synthesis and ther...
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Answered by Phoebe C. • Biology tutor
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