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Describe the process of Eutrophication.

Excess nitrates and phosphates are water soluble and enter rivers/lakes/waterway due to leaching.Algae in the water use the increased level of ions for growth. This is called Algal bloom.Build up of algae...

Answered by Junaid U. • Biology tutor

5167 Views

Describe how low blood water levels are controlled in the human body. (5 marks)

Changes in blood water levels are detected by the hypothalamus through the negative feedback mechanism in homeostasis (2 marks). The pituitary gland releases anti-diuretic hormone into the bloodstream as ...

Answered by Rehan J. • Biology tutor

5333 Views

Genetic engineering can be used to modify the genome of an organism to express desirable characteristics. Outline the steps of producing a recombinant DNA molecule.

The steps are as follows:The desired gene is isolated by 'cutting' it out using a restriction enzyme. The same restriction enzyme is then used to 'cut' a vector (plasmid or virus). These can either be lef...

Answered by Marium Z. • Biology tutor

2197 Views

How do I write a compelling descriptive essay question for English Language paper 1

Often students find the narrative choice in the 40 Mark question to be preferable. However it is possible that the exam will feature a choice between 2 descriptive questions, (therefore omitting a narrati...

Answered by Samuel W. • English tutor

2925 Views

Describe simple harmonic motion (SHM). Sketch a displacement-time graph for a particle undergoing SHM and the corresponding velocity-time and acceleration-time graphs. Use these graphs to describe the relationship between accleration and displacment.

Simple harmonic motion is periodic motion in which a restoring force acts in the opposite direction to that of displacement and is directly proportional to the displacement.The displacement-time graph for...

Answered by David G. • Physics tutor

4103 Views