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Degree: Natural Sciences (Bachelors) - Durham University
Hi, I'm Harriet. I am currently in my second year at university studying natural sciences (this is mainly biology but also includes maths and anthropology). I really enjoy coming up with creative ways to teach science to try and make it as fun as possible (well it is the best subject). Experience includes: -mentoring lower years at school -coaching rowing to all ages (have a level 2 coaching qualification) -helping various family members I have A-levels in Biology, Maths, PE, Chemistry and Geography (the first three of these I did in yr 11/12). I picked up many revision techniques during A-levels and continued to do so at university. I find the best way to explain and remember different topics is by lots of pictures, colours and interacting with the information. So expect tutoring sessions to be energetic and colourful. Biology and PE are pretty awesome subjects so well done if you've picked them for A-level, but if you can't quite get you head around a topic or struggling to remember the facts I am here to help. Also able to help with GCSE Maths.
|Biology||A Level||£20 /hr|
|Physical Education||A Level||£20 /hr|
|Physical Education||GCSE||£18 /hr|
The biological species concept classifies species as a group of actually or potentially interbreeding individuals. This means that any two individuals (well a male and female) within the group could breed and produce fertile offspring. This is definition is commonly used but there are some issues with it, and situations it can't be used in. 1) Not all species sexually reproduce 2) It can't be applied to the fossil record The phylogenetic approach is now commonly used instead of the above, especially with increased knowledge of genetics. By comparing DNA sequences it can be found which individuals have a common ancestor (an organism the whole group evolved from). This (monophyletic) group can be classed as a species. This species classification system is better as it 1) can be applied to asexual organisms 2) Can be used for extinct species if DNA is available 3) No need to test the population to see if they can interbreed as this can be very difficult 4) However it is subjective - the scientist has to decide how recent a common ancestor to use (as all individuals have a common ancestor at some point in evolution). Usually the most recent common ancestor of a population, that can be distinguished from other populations, is used.see more