William D. GCSE Biology tutor, A Level Biology tutor, GCSE Extended P...

William D.

Currently unavailable: for regular students

Degree: Palaeontology and Evolution (Masters) - Bristol University

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About me

Hi, I'm Will!

I've always been keen to help others, but most importantly I strive to keep a friendly yet still productive environment. I've been and done my A-levels and GCSEs. I understand they're a stressful time, and we all need a little helping hand every now and then to help us reach our full potential. I'm really passionate about the sciences, and hopefully you will be too after a lesson!

I'm currently a second year student at the University of Bristol. I'm studying Palaeontolgy and Evolution, which covers areas in Biology, Geology and some Physics and Maths. I also have personal interests in all sciences.

In order to help you achieve your best, The lesson needs to be planned around where you are doing well and where you struggle. For this reason, you will decide the lesson topics. Tell me where you're losing marks, or what you don't quite understand, and I'll make the lesson for you.

I'm sure most people agree that the key to good grades is exam technique. That's why my methods are based on past paper questions and learning how to understand exactly what a question wants. However, more importantly, science requires fundamental understanding to build up on, so we'll start with explaining first! 

I can be contacted through this website at any time - I'll back to you as soon as possible! You can ask questions or book lessons, just remember to let me know where you need help.

Subjects offered

SubjectLevelMy prices
Biology A Level £20 /hr
Extended Project Qualification A Level £20 /hr
Biology GCSE £18 /hr
Extended Project Qualification GCSE £18 /hr
Maths GCSE £18 /hr
-Personal Statements- Mentoring £20 /hr

Qualifications

QualificationLevelGrade
Maths with MechanicsA-LevelA*
BiologyA-LevelA
Extended Project QualificationA-LevelA*
PhysicsA-LevelB
Disclosure and Barring Service

CRB/DBS Standard

No

CRB/DBS Enhanced

No

Currently unavailable: for regular students

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Questions William has answered

Describe how fertiliser run-off can cause damage to a lake's ecosystem.

Fertilisers are generally high in nitrogen, to replenish the nitrogen in the soil assimilated by the crop plants. When this is drained into lakes in run-off, it can cause dramatic consequences. Nitrogen availability is usually the limiting factor of surface algae growth. As the nitrogen concen...

Fertilisers are generally high in nitrogen, to replenish the nitrogen in the soil assimilated by the crop plants. When this is drained into lakes in run-off, it can cause dramatic consequences. Nitrogen availability is usually the limiting factor of surface algae growth. As the nitrogen concentration increases, it becomes an excess, and the algae reproduce uncontrollably. This forms an algal bloom at the surface of the lake. The thick layer of algae absorbs and reflects all light that hits the lake, so photosynthetic organisms below the algae are deprived of light and die. This wide spread death in the lake reduces the biodiversity and alters food chains dramatically, destroying any ecosystem stability. It also creates a large amount of detritus, which feeds the breeding of anaerobic, decomposing microorganisms. These respire anaerobically with toxic waste products, causing the water to be toxic and killing most of the organisms left in the lake. This process is known as eutrophication.

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6 months ago

188 views

Explain how natural selection can lead to new species forming (speciation)

Within a gene pool of a population, there is genetic variation, due to mutation. This leads to phenotypic variation. Some individuals will be better adapted to the environment than others and will therefore be more likely to breed and pass on their alleles to the next generation. This means th...

Within a gene pool of a population, there is genetic variation, due to mutation. This leads to phenotypic variation. Some individuals will be better adapted to the environment than others and will therefore be more likely to breed and pass on their alleles to the next generation. This means that each generation will be slightly better adapted to the environment than the last, and thus evolution occurs. If a population is divided, and each fragment is isolated from each other (for example a river separating them, or continental drift), then they cannot interbreed. Each new populaion will face a different environment and therefore different selection pressures. This means that each population will begin to evolve different adaptations to suit their environment, and will eventually be so physically and genetically different that they can't breed and produce live, fertile offspring. This means that the two populations are now two seperate species, and speciation has occured. If they are reintroduced to each other (the isolating feature is lost), they will not interbreed.

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6 months ago

182 views

The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. Work out the radius of the circle. Give your answer to 1 decimal place.

Area of a square (As) = Side length (L)2 L = square root As L = square root 49 L = 7 cm Perimeter (P) = 4L P = 4 x 7 P = 28 cm P = Circumference (C) C = 28 cm C = 2pi x Radius (r) r = C / (2pi) r = 28 / (2pi) r = 4.45... r = 4.5 (1 d.p.)

Area of a square (As) = Side length (L)2

L = square root As

L = square root 49

L = 7 cm

Perimeter (P) = 4L

P = 4 x 7

P = 28 cm

P = Circumference (C)

C = 28 cm

C = 2pi x Radius (r)

r = C / (2pi)

r = 28 / (2pi)

r = 4.45...

r = 4.5 (1 d.p.)

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6 months ago

222 views
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