Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
Amelia:
--- Quote ---excuse me can u say to me what does he means to complete the table is there anything missing
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Actually, I didn't find any table myself. So, I just compared the results in the above table.
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he means safety precautions or any variables to be controls
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The question just said precautions. Why dont you write about both? First, the control of variables and then the safety.
--- Quote ---he said fresh friut can u say another thing about the first idea u said
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As in? Both fruits and vegetables loose about 10 to 90 percent of vitamin C when they are canned. You can google to find more.
I hope it's clearer.
~ Miss Relina ~:
--- Quote from: Amelia on April 10, 2011, 08:49:16 pm ---Actually, I didn't find any table myself. So, I just compared the results in the above table.
The question just said precautions. Why dont you write about both? First, the control of variables and then the safety.
As in? Both fruits and vegetables loose about 10 to 90 percent of vitamin C when they are canned. You can google to find more.
I hope it's clearer.
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Thanks yes clear but plz if u found any websites post it here
Thanks again dear
~ Miss Relina ~:
here I am really surprised ::) with the answer if anone of u guys know any idea abt it clear that doubt for me plz
Q5(b)
http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2007%20June/Unit%201%20June%202007.pdf
as in the mark scheme the answer is this(b) prophase, telophase, metaphase and anaphase;
while what i thought that it would be metaphase,telophase,anaphase, prophase ??? ???
second question Q 8 (b)(i)
plz answer & show ur steps {what i dont know is what is the max. rate as if u looked at the mark scheme u may find max.rate is 0.0069 and i donot know how to get that ???
http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2008%20June/6101-01%20Biolgy%20%28Human%29.pdf
and mark sheme :http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2008%20June/9042_GCE_Biology_msc_20080807_UA020010_doc.pdf
Thanks in advance sorry for disturbing
Amelia:
--- Quote from: Relina on April 11, 2011, 10:08:55 am ---here I am really surprised ::) with the answer if anone of u guys know any idea abt it clear that doubt for me plz
Q5(b)
http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2007%20June/Unit%201%20June%202007.pdf
as in the mark scheme the answer is this(b) prophase, telophase, metaphase and anaphase;
while what i thought that it would be metaphase,telophase,anaphase, prophase ??? ???
--- End quote ---
um.. I don't know why but I think something is wrong with the data given in the table. ::)
The number of cells observed in a phase is directly proportional to the length of that phase.
Which means, the more the no. of cells in the phase, the more the length of the phase. But the table question and the answer say two different things. Usually, Prophase takes the longest time, then teleophase, and metaphase and anaphase take almost the same amount of time. to complete the phase. Here, is another article with the same experiment.
Amelia:
--- Quote from: Relina on April 11, 2011, 10:08:55 am ---second question Q 8 (b)(i)
plz answer & show ur steps {what i dont know is what is the max. rate as if u looked at the mark scheme u may find max.rate is 0.0069 and i donot know how to get that ???
http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2008%20June/6101-01%20Biolgy%20%28Human%29.pdf
and mark sheme :http://www.xtremepapers.net/Edexcel/Advanced%20Level/Biology/2008%20June/9042_GCE_Biology_msc_20080807_UA020010_doc.pdf
Thanks in advance sorry for disturbing
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I'm not really sure about this part. But I think, they found the maximum rate by dividing the maximum concentration with decreasing rate. (decrease in rate between 38/40 and 68/70 minutes ) 0.325/47 = 0.0069. ::)
I suggest, you discuss both the above questions with your teacher. :)
And, For some reason I'm not able to reply to your pm. I get an error message saying that you have blocked my pm's. :-\
Anyways, about the quote thing. You only have to use
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separately for each line.
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