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Explain why multicellular organisms needs to develop a specialised exchange system and transport system, yet unicellular organisms do not

Unicellular organisms have a large surface area to volume that is one cell thick, therefore they have a short diffusion distance and are metabolically inactive. Therefore, they can obtain sufficient oxygen a...
DK
Answered by Deepika K. • Biology tutor
28852 Views

Find the finite area enclosed between the curves y=x^2-5x+6 and y=4-x^2

Starting by factorising the curve equations: the first one factorises to y = (x-3)(x-2) and the second one becomes y=(2-x)(2+x). From this, a rough sketch of the curves can be drawn and it can be seen that f...
RN
Answered by Ruby N. • Maths tutor
4627 Views

How would you approach an unseen poem?

Before starting anything read the poem through twice. The first time read it just to understand meaning and get a grasp of what the author might be trying to say. The second time read the poem and highlight ...
NS
Answered by Nell S. • English tutor
2258 Views

How do I answer an ELAT question?

The ELAT, although very different from the A-level format should be seen as an exciting challenge rather than a scary task - it gives you lots of freedom to be creative, and as no one has seen the passages b...
AL
Answered by Anouska L. • ELAT tutor
3578 Views

How do you calculate the relative atomic mass of an element

The relative atomic mass (A r ) is calculated from 2 things : mass numbers of its isotopes and abundance of these isotopes.Let's use Chlorine as an example. Chlorine naturally exists as two isotopes, (chlori...
PJ
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