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Describe how oxygen moves into the blood at the lungs.

Oxygen moves via diffusion from the alveoli in the lungs where there is a high concentration of oxygen, into the blood where there is a low concentration of oxygen - it moves down its concentration gradient.
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Answered by Isobel S. • Biology tutor
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What should I do to get full marks in the essay section?

The essay section is split into 3 individual questions. These 3 questions will be worth 20 points altogether, out of which 2 points will be awarded for the quality of your writing, i.e. hand-writing, grammar...
LP
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Solve 8x+ 9 > 1 + 4x

8x + 9 > 1 + 4x . Bring all x values to the Left hand side by subtracting 4x from each side. 8x -4x +9 >1 = 4x +9 >1 Bring all numbers to the right hand side by subtracting 9 from each side 4x > ...
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Answered by Dominique E. • Maths tutor
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Carbon from dead leaves is recycled through the carbon cycle. Explain how Carbon is recycled to new leaves.

Dead leaves fall from plants to the ground. These leaves contain carbon. They are digested by microorganisms like bacteria which take up carbon and then respire it into the atmosphere. Plants are autotrophs ...
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Answered by Ewa M. • Biology tutor
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Determine whether the line with equation 2x+ 3y + 4 = 0 is parallel to the line through the points with coordinates (9, 4) and (3, 8).

Parallel means that the lines have the same gradient/slope . For example, the lines in an equal sign are parallel.Consider the standard equation of a line is: y = mx + c where m is the gradient . Rewriting o...
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Answered by Dominique E. • Maths tutor
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