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Describe the stages of the carbon cycle.

Carbon dioxide in the atmosphere is taken up by producers via the process of photosynthesis to produce glucose. Some animal organisms consume the plants. Via the process of respiration, animals and plants br...
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Answered by Stevie L. • Biology tutor
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How would you define the differences between type 1 and type 2 diabetes?

There are two main types of diabetes: type 1 and type 2. Both types of diabetes are chronic diseases that affect the way your body regulates blood sugar, or glucose. Glucose is the fuel that feeds your body’...
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Answered by Hajrah U. • Biology tutor
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Describe and explain how the secretion of ADH affects urine production in the kidneys (4 marks)

ADH diffuses into the blood stream and binds to receptors present on the lining of the collecting duct/ DCT (1)This increases the permeability of the membrane of the collecting duct/ DCT (1)Therefore, more w...
Answered by • Biology tutor
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Describe the various mechanisms by which expression of genes are controlled by the cell's environment.

One of the mechanisms within a cell’s own environment that plays a part in controlling the expression of genes is histone acetylation and de-acetylation. These are the processes by which the lysine residues ...
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Answered by Yashoda J. • Biology tutor
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Osmoregulation is the process by which the body regulates the volume of water in the body. Define homeostasis and describe where osmoreceptors are located. Explain how osmoreceptors work and describe the key osmoregulation hormone and its target organ.

Osmoreceptors are located in the brain, within they posterior pituitary of the hypothalamus.Osmoreceptors shrink in response to reduced water in the blood due to movement of water from the osmoreceptor into ...
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Answered by Joely K. • Biology tutor
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