A level Biology: Post your doubts here!

[roxylara]

If anyone can please explain all the answers for these questions properly I'd be really greatful

 

[thats_me]

how do i calculate degrees of freedom with only the t-value given?
paper 5 m/j 2009 q3 b (iv)

The no. Of samples will be given in the question's first part or some where earlier in the question
it'll be( n1+n2 -2) where n is the no. Of samples

oct nov 2008 [question 2 b (iv)] paper 5!!!!
View attachment 41582

Did you get the standard error & t value? In ii & iii part?
If yes then Which part do you have problem with confidence interval or the mean?

View attachment 41583
where do i get the expected results from?

By adding all the values of observed & dividing them by 3
So 36+90+114=240/3=80

 

[roxylara]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_12.pdf
Question 9 ?
Why isn't it D ?

Amylopectin has 1,4 and 1,6 linkages so I think it should be B

 

[♣♠ Magnanimous ♣♠]

Sure thanks

Mitosis is then from a haploid number and meiosis from a diploid no...

Got it! Thanks!
No more needed
Okhay btw.. Mitosis is then from a haploid number and meiosis from a diploid no... Ryt?

well i wanna say that your statement is fully incorrect because except gamete cell all other cells mitosis occurs so it starts from diploid no of chromosomes and ends to diploid whereas meosis starts from haploid cells and ends to haploid no of chromosomes..
i hope you got now.

 

[thats_me]

Its B

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_12.pdf
Question 9 ?
Why isn't it D ?[/quotI

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_11.pdf

Question 24??
And question 23??
Plus q 22 as well is it cuz amylase is basicallyl retaliated to protein?

well i can say about only 22) amylase will come because DNA controls protein synthesis.
i am sorry but i too have doubt in other two ques.

 

[Zain Javaid]

 

[♣♠ Magnanimous ♣♠]

View attachment 41589

the answer is D

 

[♣♠ Magnanimous ♣♠]

View attachment 41589

DeViL gURl B) what is your answer?

 

[mynameisnotneeded]

View attachment 41589

I think it's D coz Ventricular end diastolic volume can rise but there is a limit as to how much blood the heart can pump.
Thus there is a limit to the maximum stoke volume...

 

[DeViL gURl B)]

Mitosis is then from a haploid number and meiosis from a diploid no...

well i wanna say that your statement is fully incorrect because except gamete cell all other cells mitosis occurs so it starts from diploid no of chromosomes and ends to diploid whereas meosis starts from haploid cells and ends to haploid no of chromosomes..
i hope you got now.

Ohh okha oka ... Got it! Thanks a lot!

 

[♣♠ Magnanimous ♣♠]

Ohh okha oka ... Got it! Thanks a lot!

no probs.

 

[DeViL gURl B)]

U

DeViL gURl B) what is your answer?

Ummm is it B?

 

[♣♠ Magnanimous ♣♠]

U

Ummm is it B?

nope.... it's D you are absolutely wrong.

 

[DeViL gURl B)]

Its B

But yar...isn't it like as in starch has both amylose and amylopectin ...

 

[DeViL gURl B)]

nope.... it's D you are absolutely wrong.

Thank u for testing my knowlege .. And proving it absolutely wrong

 

[DeViL gURl B)]

Y

nope.... it's D you are absolutely wrong.

D?

 

[♣♠ Magnanimous ♣♠]

Thank u for testing my knowlege .. And proving it absolutely wrong

yar.... really your answer is wrong and i got verification too that my answer is right..

 

[♣♠ Magnanimous ♣♠]

Y

D?

I think it's D coz Ventricular end diastolic volume can rise but there is a limit as to how much blood the heart can pump.
Thus there is a limit to the maximum stoke volume...

 

[DeViL gURl B)]

yar.... really your answer is wrong and i got verification too that my answer is right..

Okhay.. U're right now y are u right.. Explanation required