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# 18/05/10 Edexcel Bio 6(6BI08) watch

1. (Original post by Doughboy)
Do you have it?
Yes....but in hard copy version and not in my PC so cant post it [email protected] !
2. (Original post by shuvo_roy)
what statistical tests are we supposed to know other than t-test?
U test, Spearman's rank correlation test, chi squared test and wilcoxon matched pair test
3. (Original post by angelikgrrl)
U test, Spearman's rank correlation test, chi squared test and wilcoxon matched pair test
Do we have to know how to calculate them or the value will be given and we just have to compare with the critical value?
4. (Original post by shuvo_roy)
Do we have to know how to calculate them or the value will be given and we just have to compare with the critical value?
In the planning question, no you just have to say the comparison of the value to critical value and when to reject the null hypothesis.
There is a calculation question using these test, in that you have to if they ask, I guess. Our teacher didn't go in to much depth with those calculation so I am assuming its not that important for Edexcel :/
5. The actual process of obtaining t-value involves finding standard error, standard deviation and some other easy stuff. Edexcel would have to give us the formula for t-test if they expect us to find the t-value. If they don't, then I will die. I'm not wasting valuable time learning those formulae.

I'm basically dreading the planning question.
6. Well, so what are you doing for the planning questions?
7. Does anyone have any advise for unit 3!!!!
8. (Original post by jenny261)
Does anyone have any advise for unit 3!!!!
I'm doin unit 3 too~9 practicals
9. (Original post by jonathan3909)
I'm doin unit 3 too~9 practicals
how are you preparing for it?
and do you have any resousres for it as well as for phy6 plz!!!
10. (Original post by jenny261)
how are you preparing for it?
and do you have any resousres for it as well as for phy6 plz!!!
Don't you have the booklet containing all the practicals??
11. (Original post by jonathan3909)
Don't you have the booklet containing all the practicals??
But that is not very good, I mean it just gives the method, I would like something in point form.
And do you have anything for phy6?
12. (Original post by jenny261)
But that is not very good, I mean it just gives the method, I would like something in point form.
And do you have anything for phy6?

If you haven't started Bio yet,You better start it-It's not [email protected]
13. (Original post by jonathan3909)
If you haven't started Bio yet,You better start it-It's not [email protected]
I have strted but I'm i need of the core practicals!!!
14. Do we have to learn the 8 practicals for 6b? Its useless for 3b
15. (Original post by angelikgrrl)
Do we have to learn the 8 practicals for 6b? Its useless for 3b
Yes-In total you have to learn 17 practicals(8 of A2 and 9 of As)
16. Have you guys tried the W2 questions in the past paper? Its good for 6B...
17. (Original post by angelikgrrl)
Have you guys tried the W2 questions in the past paper? Its good for 6B...
This time there are 17 practicals to do-And unit 3b was not easy and neither will be 6b
18. (Original post by jonathan3909)
This time there are 17 practicals to do-And unit 3b was not easy and neither will be 6b
Well, doing W2 makes you better at the planning question. That's my weakest point.
19. If it's not a bother, then could you please post the names of the 8 practicals for A-level Biology.

I think my teacher only gave us 7. =/
20. (Original post by Lawlessness)
If it's not a bother, then could you please post the names of the 8 practicals for A-level Biology.

I think my teacher only gave us 7. =/
You need to know 17 in total-9 of As and 8 of A2!

Describe how the effect of caffeine on heart rate
in Daphnia can be investigated practically, and
discuss whether there are ethical issues in the use of
invertebrates.

Describe how to investigate the vitamin C content of
food and drink.

Describe how membrane structure can be investigated
practically, eg by the effect of alcohol concentration or
temperature on membrane permeability.

Describe how enzyme concentrations can affect the
rates of reactions and how this can be investigated
practically by measuring the initial rate of reaction.

Describe the stages of mitosis and how to prepare
and stain a root tip squash in order to observe them
practically.

Describe how totipotency can be demonstrated
practically using plant tissue culture techniques.

Describe how to determine the tensile strength of plant
fibres practically.

Describe how to investigate plant mineral deficiencies
practically.

Describe how to investigate the antimicrobial properties
of plants.
________________________________ ____________________________
Describe how to carry out a study on the ecology of a
habitat to produce valid and reliable data (including
the use of quadrats and transects to assess abundance
and distribution of organisms and the measurement
of abiotic factors, eg solar energy input, climate,
topography, oxygen availability and edaphic factors).

Describe how to investigate the effects of temperature
on the development of organisms (eg seedling growth
rate, brine shrimp hatch rates).

Describe how DNA can be amplified using the
polymerase chain reaction (PCR).

Describe how gel electrophoresis can be used to
separate DNA fragments of different length.

Describe how to investigate the effect of different
antibiotics on bacteria.

Describe how to investigate rate of respiration
practically.

Describe how to investigate the effects of exercise
on tidal volume and breathing rate using data from
spirometer traces.

Describe how to investigate habituation to a stimulus.

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