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Explain the structures and steps involved in the coordination of the reflex action. (6 marks)

To score full marks in this question the student should provide:'Scientifically relevant facts, events or processes are identified and given in detail to form an accurate account.' (Level 2: 4-6 marks)The st...
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Answered by Nelima H. • Biology tutor
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How does the body respond to increased body temperature in order to maintain homeostasis and why is this an important mechanism ?

The body responds in three ways: by the blood vessels in our skin dilating (vasodilation) so heat is brought the surface and can be lost by radiation, by sweat glands secreting sweat loosing heat that is tra...
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Answered by Ailsa F. • Biology tutor
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Where does photosynthesis take place?

It occurs in plant cells, in the chloroplasts, found in the mesophyll layer. Chloroplasts contain chlorophyll necessary to absorb light.
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Answered by Lorenzo R. • Biology tutor
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Explain the roles of specific enzymes in prokaryote DNA replication. [7 marks]

DNA replication is the same in eukaryotes and prokaryotes; the question just emphasizes that the process depends on enzymes and their functions need to be explained. DNA gyrase (or topoisomerase II) relieves...
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Answered by Hristo S. • Biology tutor
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What's the difference between Eukaryotic and Prokaryotic cells?

Eukaryotic cells have membrane-bound organelles such as the nucleus, the endoplasmic reticulum and the mitochondria which are not found in the prokaryotic cells. Examples of eukaryotic cells include animal a...
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Answered by Lorenzo R. • Biology tutor
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