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Explain how eutrophication can result in low oxygen levels in the water in the stream.

Eutrophication occurs when excess nitrates from fertilisers seep into the stream. The nitrates cause algal bloom on the surface of the water. As a result, sunlight is blocked from reaching the plants underwa...
NB
Answered by Nadia B. • Biology tutor
4805 Views

List 3 similarities and differences between the structure of a plant cell and an animal cell

Similarities:They both have a cell membraneThey both have a nucleusThey both have cytoplasmDifferences:A plant cell has a cell wall but an animal cell doesn'tA plant cell has a vacuole but an animal cell doe...
SR
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Solve y = 2x^2 - 5x - 1 for x = -1 and x = 2

y = 2 (-1) 2 -5(-1) -1y = 2 + 10 - 1y = 11y = 2 (2) 2 -5(2) -1y = 8 - 10 -1y = -3
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Answered by Anna B. • Maths tutor
5190 Views

Show that the lines y-5x=2 and 6y-30x=36 are parallel

Rearrange both equations so that both are in the form y= something. Move the x terms to the right of both equations. y=5x+2 6y=30x+36 Factorise second equation so that common factor of 6 is shown. 6y=6(5x+6)...
MB
Answered by Madeleine B. • Maths tutor
3763 Views

What exactly is meant by 'balancing equations'?

Chemical reactions can be written as an equation with molecules on each side of the equation. Balancing equations is about ensuring that the number of atoms of each element on the left hand side of an equati...
MF
Answered by Michael F. • Chemistry tutor
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