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Describe the three types of coral reefs and explain why reefs are sensitive to environmental changes

Fringing, barrier and atoll reefs described, with a description of how a fringing reef is close to the coast in shallow water zones, barrier reefs develop through subsidence with a separation between the coa...
HW
Answered by Hamish W. • Geography tutor
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Your school/college has organised an exchange trip to France. As part of the programme, you spend several days staying with a French family. On your return you are asked to write an account of your experience in French for your school/college website.

Bonjour à tous !Aujourd'hui je vais vous raconter mon séjour en France, où je suis passé quelques jours avec une famille française. J'y suis allé en avion, arrivant à Paris avant de partir en train à Rennes,...
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Answered by Hamish H. • French tutor
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What is the centre and radius of the circle x^2+y^2-6x+4y=-4

First make left =0x 2 +y 2 -6x+4y+4=0Second put same terms together(x 2 -6x)+(y 2 +4y)+4=0Complete the Square (do a square (X+b) 2 that gives you you x 2 and x terms, repeat with y) these give you the centre...
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Answered by Flik C. • Maths tutor
3575 Views

Solve( 3x−2)/4 −(2x+5)/3= (1−x )/6

Firstly, take a common denominator for the left hand-side of the equation which would be 12 and then carrying out the subtraction. After carrying out the subtraction you will be left with two fractions - one...
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Answered by Wahid R. • Maths tutor
5261 Views

What is meant by the term mutation?

It is a random and spontaneous change to DNA that can be inherited. Most mutations have no effect on the phenotype, however some have a small effect and rarely do some have a significant effect.
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Answered by Sebastian S. • Biology tutor
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