Top answers

Describe and explain some of the direct and indirect effects of carbon dioxide on organisms?

Carbon dioxide only comprises 0.04 % of the earth’s atmosphere but it is a vital molecule in many processes and effects organisms directly with photosynthesis in plants, body functions causing global warming...
KD
Answered by Katie D. • Biology tutor
18839 Views

Explain these 3 terms in relation to cells and osmosis: isotonic, hypertonic and hypotonic?

These 3 terms all describe the 3 possible concentrations of a solution in respect to the water potential surrounding a cell. Isotonic solution (Iso=same and tonic=strength) is where the extracellular fluid h...
KD
Answered by Katie D. • Biology tutor
46348 Views

3x+5y=7 and 9x+11y=13. Solve to find the values of x and y that satisfy both equations.

As there are two unknowns we have to eliminate either the x or the y in order to be able to solve. You can see that in the first equation the x value is a multiple of the x value in the second equation. Ther...
GS
Answered by Georgina S. • Maths tutor
4509 Views

How should I pick a college to apply to?

Picking a college is arguably a very important part of your application to Oxbridge as it is where you will be spending the majority of your time at. My advice would be to first check which colleges offer yo...
DN
2452 Views

What is Differentiation?

We use differentiation to generally find the rate of change for a function. This could also be interpreted as finding the gradient of a curve. e.g. y = x ^ 2. If you consider the curve, it has a different gr...
JP
Answered by Jigar P. • Maths tutor
5289 Views