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Contrast the processes of facilitated diffusion and active transport (3 marks)

Note that the question is 3 marks. Also note the question uses the word 'contrast' so you must talk about both processes. Cells must communicate with their external environment and vice versa, therefore, sub...
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Name 3 effects that the sympathetic nervous system has on human physiology?

Constriction of blood vessels Dilation of pupils Slows down digestion
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Answered by BARIBEFE V. • Biology tutor
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How does Natural Selection occur?

In the population of a species there will always be a selection pressure (new predator/competitor/ presence of disease) There is genetic variation within the population so new alleles can arise due to random...
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How does DNA replication work?

DNA replication is called semi-conservative, because each original strand is used to create a new strand. In order to do this, first we need to separate the two strands: they are unwound and unzipped by the ...
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Answered by Ellie T. • Biology tutor
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Describe the process of DNA replication

DNA replicates via semi-conservative replication . This means one strand acts as the template strand. The enzyme DNA Helicase breaks the hydrogen bonds between base pairs in DNA. This unwinds the DNA, exposi...
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Answered by Joanna D. • Biology tutor
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