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# OCR 2010 A2 Biology Unit 2 - Control, Genome and Environment watch

1. (Original post by Remarqable M)
hi guys finished module 3 it wasn't as hard as i expected but that is because our class went over it in june last year
i still can't get my head round module 1 anyways i will be starting module 4 tomorrow on my own i find it so interesting not so boring as in module 1.
Good good :P
2. (Original post by ibysaiyan)
Great ! i am having hard time with fp2 ;p oh which board is it?
edexcel
edexcel
Ah aqa here: with fp2 consisting of: de moivres theorem,complex numbers,roots of complex numbers,summation of finite series, hyperbolic functions,inverse functions + surface area
4. (Original post by ibysaiyan)
Ah aqa here: with fp2 consisting of: de moivres theorem,complex numbers,roots of complex numbers,summation of finite series, hyperbolic functions,inverse functions + surface area
edexcel fp2 consists of:inequalities,series,further complex numbers,first order differentials, second order differentials, maclaurin and taylor series and polar coordinates.

i find fp1 soooo easy...i think edexcel made it easy, how is aqa fp1?
edexcel fp2 consists of:inequalities,series,further complex numbers,first order differentials, second order differentials, maclaurin and taylor series and polar coordinates.

i find fp1 soooo easy...i think edexcel made it easy, how is aqa fp1?
fp1 is breeze compare to fp2 lol: its got more content but meh

. Coordinate Geometry
2. Inequalities
3. Complex Numbers
4. Algebra and Functions
5. Sequences and Series
6. Differentiation
7. Integration
8. Numerical Methods
9. Trigonometry
10. Matrix Algebra
6. (Original post by ibysaiyan)
fp1 is breeze compare to fp2 lol: its got more content but meh

. Coordinate Geometry
2. Inequalities
3. Complex Numbers
4. Algebra and Functions
5. Sequences and Series
6. Differentiation
7. Integration
8. Numerical Methods
9. Trigonometry
10. Matrix Algebra

Ahh dude..u should see edexcel its got 6 chapters....they made it for dummies..lol
content is:
1)complex numbers
2)numerical solutions
3)coordinate systems
4)matrix algebra
5)series
6)proof by mathematical induction

nite im off to sleep
Ahh dude..u should see edexcel its got 6 chapters....they made it for dummies..lol
content is:
1)complex numbers
2)numerical solutions
3)coordinate systems
4)matrix algebra
5)series
6)proof by mathematical induction

nite im off to sleep
hah :P lucky you heh.good night
8. Differences between the definition of species i.e which is better?
Biological species concept: Species are group of organisms that share same genetic, physiological,morphological and structural characteristic and are able to reproduce.
Phylogenetic definition: Is based on the evolutionary concept i.e if a specie share/shared a common ancestor at time x.
Disadvantage of biological species definition is that it can be applied to organisms that reproduce sexually.
9. Do we need to know about discontinuous variation and how it arises? that was in last years module...
10. (Original post by ibysaiyan)
Do we need to know about discontinuous variation and how it arises? that was in last years module...
i think so weird isn't it?
11. (Original post by Remarqable M)
i think so weird isn't it?
Damn it! grr
ok this for discontinuous variation to occur:
1) There need to be more than one gene controlling a phenotype.
2) More alleles for a particular gene.
Thats all in the book.
Oh btw. remarq have you done cloning stuff yet?I am doing it right now.. boring as hell
12. (Original post by ibysaiyan)
Damn it! grr
ok this for discontinuous variation to occur:
1) There need to be more than one gene controlling a phenotype.
2) More alleles for a particular gene.
Thats all in the book.
Oh btw. remarq have you done cloning stuff yet?I am doing it right now.. boring as hell
yea i've done cloning(vegetative propogation and elms tree etc)
i agree borin but there is nothing we can do we just have to learn it
I'm going to bed i was playing football today and my muscles are hurting i see you tomorow bye
13. (Original post by Remarqable M)
yea i've done cloning(vegetative propogation and elms tree etc)
i agree borin but there is nothing we can do we just have to learn it
I'm going to bed i was playing football today and my muscles are hurting i see you tomorow bye
Tomorrow later good night to you.
14. Module 4 already... as if! I've just about finished Mod 1 and half way through Mod 2... Ahhh how do you people revise!
15. (Original post by ibysaiyan)
Damn it! grr
ok this for discontinuous variation to occur:
1) There need to be more than one gene controlling a phenotype.
2) More alleles for a particular gene.
Thats all in the book.
Oh btw. remarq have you done cloning stuff yet?I am doing it right now.. boring as hell
You've also got the environment playing a part. Someone may have the genes for being tall, but if they are deprived of food/nutrients then they will never reach their full potential.
16. (Original post by xXxBaby-BooxXx)
You've also got the environment playing a part. Someone may have the genes for being tall, but if they are deprived of food/nutrients then they will never reach their full potential.
Oh yea which reminds me the book also talked about genetic dirft and genetic something lol <_< from what i remember not sure but do we get genetic drift when a specie is under a selection pressure? or is that when i spontaneous random (mutation occurs) <-- i think its this one.
17. (Original post by ibysaiyan)
Oh yea which reminds me the book also talked about genetic dirft and genetic something lol <_< from what i remember not sure but do we get genetic drift when a specie is under a selection pressure? or is that when i spontaneous random (mutation occurs) <-- i think its this one.
Genetic Drift - Random fluctuations in the frequency of the appearance of a gene in a small isolated population, presumably owing to chance rather than natural selection. The effect is almost negligible in a large population.

I can't think what you mean by the other one Remember the word and I might be able to help :P
18. Chi squared test (X2)

Statistical test using categoric data to see the difference between observed results and those predicted from theory.

(O-E)2/E

The null hypothesis - there is no difference between observed and expected results.

Method:
1) Calculate expected from ratios (if given)
2) Draw table
3) Do O and E columns (for observed and expected results)
4) O-E
5) (O-E)2
6) (O-E)2/E
7) Calculate sum of last column to get X2.

-Degree of freedom = (number of categories) - 1
-Read across the table of probability with the probability being 0.05.
-Write down critical value.

p>0.05 - result is not significantly different from expected.
- Null hypothesis is accepted.

p<0.05 - significant difference between observed and expected result.
- Prediction rejected and procedure reviewed to see if they've
been any errors.

19. I've just done a 29 slide presentation on the Sliding Filament Theory of muscle contraction. Full of diagrams and a video, my teacher should love it :P

Sorry, I'm just so proud of my achievement, I've had to brag on facebook, and now here.

I'm done now
20. (Original post by student92)
Chi squared test (X2)

Statistical test using categoric data to see the difference between observed results and those predicted from theory.

(O-E)2/E

The null hypothesis - there is no difference between observed and expected results.

Method:
1) Calculate expected from ratios (if given)
2) Draw table
3) Do O and E columns (for observed and expected results)
4) O-E
5) (O-E)2
6) (O-E)2/E
7) Calculate sum of last column to get X2.

-Degree of freedom = (number of categories) - 1
-Read across the table of probability with the probability being 0.05.
-Write down critical value.

p>0.05 - result is not significantly different from expected.
- Null hypothesis is accepted.

p<0.05 - significant difference between observed and expected result.
- Prediction rejected and procedure reviewed to see if they've
been any errors.
Will these just be the epistasis ratios ( as in the ones we have to learn)?

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