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State and explain two adaptations of a red blood cell?

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell. Red blood cells do not have a nucleus so they...
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Answered by Joe D. • Biology tutor
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Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H 2 O(l) = 2KOH(aq) + H 2 (g) Potassium (K) is a group 1 metal, which is a solid. Water (H 2 O) reacts with Potassium to form Potassium Hydroxide (KOH) and Hydrogen (H 2 ). Hydrogen exists naturally...
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Answered by Joe D. • Chemistry tutor
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How can I check if my reaction equations are correct?

The basic principle about chemical reactions is that whatever goes in one end, will undoubtedly come out the other! The simplest way to make sure your reactions are correct is to count what you have on each ...
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Answered by Alexia K. • Chemistry tutor
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How important are case studies?

Case studies will form the backbone of your Geography GCSE. It is worth creating a short summary for each case study you cover throughout the year. That way when you come to revision they are in a format tha...
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Answered by Eleanor C. • Geography tutor
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What is an easy way to pick up marks in the biology GCSE?

Biology GCSE like any other requires a basic level of understanding, but in addition it requires you to use scientific terminology. By using specific words or descriptions in your answers you make it easier ...
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Answered by Eleanor C. • Biology tutor
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