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How does the kidney work in homeostasis?

The kidney is involved in osmoregulation (the control of blood water concentration): this is primarily controlled by the hormone ADH which is released from the pituitary gland in the brain when water concent...
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Answered by Molly H. • Biology tutor
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Discuss the evolutionary order of appearance of the mitochondrion, chloroplast and ribosome, explaining your reasoning

By considering which organisms have each of the referred organelles, we can infer their evolutionary order of appearance.Ribosomes are present in every living cells, whereas mitochondria and chloroplasts are...
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Answered by Maria P. • Biology tutor
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Describe the steps of mitosis. (10 Marks)

One mark is given for correctly naming each step (of which there are 7 possibilities). Another is given for a correct description of each stage.Prophase: Chromatin condenses to chromosomes / nucleolus disapp...
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Answered by Michael G. • Biology tutor
4025 Views

How does temperature effect enzymes?

Under 0 degree celcius, ice crystals will begin to form in the cell membrane of the enzyme. If the temperature increases and the enzyme thaws, the pierced cell membrane will cause leakage and prevent the enz...
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Answered by Erin H. • Biology tutor
3570 Views

What is protein synthesis and how does it work?

Protein synthesis is the process in which proteins are produced within cells, from the DNA in the cell nucleus. It is divided into two steps: transcription and translation. Transcription is when the DNA in t...
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Answered by Nicole C. • Biology tutor
5352 Views