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Explain DNA replication (SL).

DNA replication is the process through which two new strands of DNA are synthesized from the original molecule and predominantly occurs in the S phase of the cell cycle prior to mitosis. To put it simply, we...
JM
Answered by Jordi M. • Biology tutor
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Why does the nervous system have synapses if they slow down transmission?

Synapses are chemical connections between neurons which do indeed slow down transmission. However, they provide the nervous system with many benefits that could not be achieved without them: They ensure that...
SJ
Answered by Samuel J. • Biology tutor
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The genetic code is described as being degenerate. What does this mean? and why ?

We say that the genetic code is degenerate because there are several codons, which code for the same amino acid. For example UCA, UCU, UCG and UCC all code for Serine. This is due to the fact that mRNA codin...
MD
Answered by Maria D. • Biology tutor
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If cells can respire anaerobically, why do humans need oxygen?

Cells can indeed respire - or release energy - without oxygen, using anaerobic respiration. Here, energy is released from glucose to generate a substance called lactic acid. This is a good temporary solution...
SJ
Answered by Samuel J. • Biology tutor
26345 Views

In the food web shown: Heather -> Rabbit -> Fox, only a small percentage of the Sun’s energy captured by the heather is eventually incorporated into the body tissues of the fox. Explain what happens to the rest of the energy captured by the heather.

To get all FIVE marks for this question, there needs to be FIVE clear , balanced and detailed explanations. - Respiration releases energy. Some energy is lost in animals through waste materials. Some energy ...
CD
Answered by Chaitya D. • Biology tutor
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