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What is eutrophication and what are its effects?

Eutrophication occurs when excess nutrients, like nitrates and phosphates, enter a body of water. These excess nutrients cause an increase in plant and algal growth in the water, often leading to an algal bl...
IH
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Describe how the RER is involved in the production of enzymes. [2 marks] June 2014

To attain the two marks you have to say that the RER contains ribosomes and these synthesis proteins. Enzymes are specialised proteins.
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Answered by Tony A. • Biology tutor
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what are the functions of neurones?

Motor neurone - carry info from the central nervous system to the effector cells Sensory neurones - carry info from sensory receptors to the CNS relay neurones - carry signals from one part of the CNS to ano...
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Answered by Tamara S. • Biology tutor
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Describe the role of stem cells and a therapeutic use

Stem cells are undifferentiated cells that retain the ability to specialize. In animals/ mammals, they are found in the embryos and adult tissue and in plants they are found in the meristematic tissue in the...
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Answered by Lakshmi Y. • Biology tutor
5401 Views

Describe the structure of DNA

Firstly, when answering an IB essay question, remember that you are noted through key words or concepts. I will put these in italics and then explain them. DNA is composed of nucleotides , each nucleotide co...
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Answered by Céline D. • Biology tutor
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