Bobbie C. GCSE Biology tutor, A Level Extended Project Qualification ...

Bobbie C.

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Degree: Psychology (Bachelors) - Bristol University

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About me

About Me:

I am currently studying Psychology at the University of Bristol. 

During my time in Sixth-Form I took part in a mentor programme where I attened lessons for the younger years and helped them with any questions or issues they may have.  Having achieved all As and A*s in my GCSEs and A-levels, I feel I am in a good position to help you in my subjects. 

Tutorials

Please do tell me which particular parts of your work you a struggling on! I am here to help you, so do not hesitate to ask to go over a subject again, be it for revision or down to forgetting.   If you would like help understanding feedback you have recieved at school or college, feel free to ask  me to take a look and I can help you to understand where mistakes were made and how to improve. 

EPQs

Need help with sources? Don't understand how to reference?     I completed an EPQ of my own in the summer after my AS-levels and so I understand the prospect of independent learning and research is daunting.   I am happy to help you with any aspect of the EPQ you need and will do my best to ease any worries or concerns you may have about completing it. 

If you have any more questions, do contact me and I will respond as soon as I can. 

Subjects offered

SubjectLevelMy prices
Extended Project Qualification A Level £20 /hr
Psychology A Level £20 /hr
Biology GCSE £18 /hr
Chemistry GCSE £18 /hr

Qualifications

QualificationLevelGrade
BiologyA-LevelA*
ChemistyA-LevelA
PsychologyA-LevelA
EPQA-LevelA
Disclosure and Barring Service

CRB/DBS Standard

01/02/2015

CRB/DBS Enhanced

No

Currently unavailable: no new students

Questions Bobbie has answered

How does Meiosis increase variation?

In the first stage of Meiosis 1 - Prophase 1, after the chromosomes have coiled and condensed they ay touch each other at points known as chiasmata, and Crossing Over occurs. This is where genetic information is swapped between the pair of chromosomes. This results in a change in genetic code ...

In the first stage of Meiosis 1 - Prophase 1, after the chromosomes have coiled and condensed they ay touch each other at points known as chiasmata, and Crossing Over occurs. This is where genetic information is swapped between the pair of chromosomes. This results in a change in genetic code and thus, increases variation. 

Also, in metaphase 1 and , chromosomes are arranged by random segregation and in Anaphase I and II chromosomes are independantly separated due to this random allignment and this, along with crossing over, means that the genetic code in each of the 4 haploid cells formed is different, thus creating varied cells. 

Another way meiosis allows variation to happen is because during interphase, when DNA is replicated, mutations may occur, meaning the genetic code differs from that of the parent and so their DNA has changed.

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1 year ago

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How has stress been linked to addiction?

There have been many studies into this area. For example, in 2008, Driessen and his team found that 30% of drug addicts and 15% of alcoholics suffered from post-traumatic stress disorder.  This shows a clear link between the two, suggesting that those exposed to severe stress are more vulnerab...

There have been many studies into this area. For example, in 2008, Driessen and his team found that 30% of drug addicts and 15% of alcoholics suffered from post-traumatic stress disorder.  This shows a clear link between the two, suggesting that those exposed to severe stress are more vulnerable to addictions. 

However, Hajek et al suggested that this is not the case.  They found that addictions, for example, smoking does not decrease stress and sometimes even increases levels of stress. Therefore, this contradicts that stress is a cause of addictions, yet they did note that the act of having another cigarette once someone is already addicted will reduce the stress induced by the addiciton itself. 

Another study against the argument that stress leads to addiction was conducted by Cloniger. He stated that there is two types of alcoholics, type 1s who drink to reduce tension, and type 2s who drink to relieve boredom.  Therefore, stress only explains the vulnerability of type 1s to becoming addictions. Since this shows that the explanation that stress causes addiciton does not apply to everyone, it reduces the validity of the explanation. 

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1 year ago

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How is trigonometry used on non-right angled triangles?

To do this, there are two rules, the Sine Rule and The Cosine Rule.  The sine rule is a/Sin A   = b/Sin B = c/Sin C.  (the lower and uppercase are very important. The rule also stands if you write the entire thing the other way up. The sine rule is used when you either have the vlaue of two a...

To do this, there are two rules, the Sine Rule and The Cosine Rule. 

The sine rule is a/Sin A   = b/Sin B = c/Sin C.  (the lower and uppercase are very important. The rule also stands if you write the entire thing the other way up.

The sine rule is used when you either have the vlaue of two angles and one side, or  two sides and one angle opposite one of those sides of a triangle. 

Label the triangle clockwise starting with the angles. Use uppercase (A) to label the angles. Next, label the sides opposite each angle with its respective lowercase letter (a)

Then simply input the values you have into the correct places of the formula. 

If you cannot use the sine rule, use The Cosine Rule:

a2 = b2 + c2 - 2bc cos A

b2 = a2 + c2 - 2ac cos B

c2 = a2 + b2 - 2ab cos C

You must work out which of these to use depending on what values you are given in your question. 

To use the cosine rule you either need the length of all 3 sides, or the length of 2 sides and angle.  Label your triangle in the same way as you would using the Sine rule.  Then, input the numbers into the formula you have chosen. 

If you are left with Cos/ Sin/ Tan x, remember to use the inverse to get the answer. E.g. if Cos A = 0.764, A is found by pressing the Cos-1 sign on your caluclated to find the inverse of Cos 0.764. I.e 40.2. 

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1 year ago

374 views
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