so i think we should go with what the text book says and also june 2012 is more recent so that means they probably produce memory cells...
thanks for the help !!!
I'm talking about this book if you don't know.
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so i think we should go with what the text book says and also june 2012 is more recent so that means they probably produce memory cells...
thanks for the help !!!
Net primary productivity = energy absorbed - energy lost in respirationhttp://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_12.pdf
please help with question number 39
yup i know it,thanks but there's a newer edition and i was afraid that it might have written something different!!I'm talking about this book if you don't know.http://www.amazon.com/level-Biology-Cambridge-International-Examinations/dp/0521703069
thank you!Net primary productivity = energy absorbed - energy lost in respiration
energy absorbed = 1,000,000 - 990,000 = 10,000
energy lost in respiration = 5,000 (shown in the diagram)
Net primary productivity = 10,000 - 5,000 = 5,000
Percentage of light energy converted to net primary productivity = (5,000/1,000,000) x 100% = 0.5%
oh really? wow, I didn't know that. o_o, well I hope they don't change their statement.yup i know it,thanks but there's a newer edition and i was afraid that it might have written something different!!
ohh thank you! I just realized the option said amylase, i misread it as amylose the whole time. -.-I think that would be because amylase is an enzyme and enzymes are proteins by nature. The DNA maps out the basic protein formation and hence the answer is A. Hope I helped!![]()
that's kinda confusing, because the answer is D. if it's directly proportional, shouldn't it be C? or there's a limit?I'm not sure if it's mentioned in the AS Biology book, but the square of the stroke volume is directly proportional to the ventricular end-diastolic volume.
Also do you know why the answer to question 24 is C? Once again, thanks!I think that would be because amylase is an enzyme and enzymes are proteins by nature. The DNA maps out the basic protein formation and hence the answer is A. Hope I helped!![]()
The stroke volume should logically increase when the volume of blood in the ventricles increases, but the straight line indicates a linear relationship. It cannot be linear as a certain volume of blood is never expelled from the ventricles.I don't get this question ! why is it not c ?
The question states, "which range of partial pressures of oxygen produces the greatest change of percentage saturation haemoglobin per unit oxygen tension"Why B ???View attachment 18193
I guess it's asking for the gradient. B has the steepest gradient, meaning the changes of saturation in percentage per unit is the highest.Why B ???View attachment 18193
hopefully notoh really? wow, I didn't know that. o_o, well I hope they don't change their statement.
To find the greatest change in % saturation of Hb, move 1 small square to the right along the x-axis, and see the corresponding change on y-axis. This change is greatest where the graph is steepest, in the B region.Why B ???View attachment 18193
i started from 2007-2012 both may/june and oct/novHey guys.For paper 1, from which year will you guys start practicing??
I deleted my post. Here is exactly what I know:that's kinda confusing, because the answer is D. if it's directly proportional, shouldn't it be C? or there's a limit?
The syllabus changed after 2006, so I only solved from 2007 and onwards.Hey guys.For paper 1, from which year will you guys start practicing??
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