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The surface area of the small intestine in a healthy person is really large! The reason for this is the villi covering the inside of the small intestine. We need all this surface area to absorb the nutrie...

Chlorophyll.

Firsty, read the question carefully, making sure to underline any key points so that you understand exactly what the question is asking. Look at the marks awarded for the question, this should give you so...

The cell membrane is a semi-permeable structure that surrounds a cell and it is present in plant, animal and bacteria cells. It is semi-permeable because some substances such as glucose and water can pass...

Photosynthesis is an endothermic reaction- energy is added (endo-in, exo-exit)
H₂O + CO₂ ==> C₆H₁₂O₆ + O₂Photosynthesis is a proce...