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Author Topic: IGCSE Biology  (Read 3994 times)

Offline amachq

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IGCSE Biology
« on: June 05, 2009, 11:04:08 pm »
can any one tell what was the Answer of bio paper 1 question no 40.
my email is adnan_machq@hotmail.com.reply me there .thankyou
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Offline Kim

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Re: IGCSE Biology
« Reply #1 on: June 06, 2009, 11:42:50 am »
Quote from: amachq on June 05, 2009, 11:04:08 pm
can any one tell what was the Answer of bio paper 1 question no 40.
my email is adnan_machq@hotmail.com.reply me there .thankyou
the answer was D
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Offline IG DUDE

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Re: IGCSE Biology
« Reply #2 on: June 06, 2009, 11:45:51 am »
Quote from: amachq on June 05, 2009, 11:04:08 pm
can any one tell what was the Answer of bio paper 1 question no 40.
my email is adnan_machq@hotmail.com.reply me there .thankyou
IT WAS SURELY D!! ;D
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Offline guru007

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Re: IGCSE Biology
« Reply #3 on: June 07, 2009, 05:38:46 am »
Quote from: IG DUDE on June 06, 2009, 11:45:51 am
Quote from: amachq on June 05, 2009, 11:04:08 pm
can any one tell what was the Answer of bio paper 1 question no 40.
my email is adnan_machq@hotmail.com.reply me there .thankyou
IT WAS SURELY D!! ;D


It was undoubtedly D as the 0xygen level decreases after bacteria decomposition !!!
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Offline 17

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Re: IGCSE Biology
« Reply #4 on: June 07, 2009, 05:41:09 am »
Quote from: guru007 on June 07, 2009, 05:38:46 am
Quote from: IG DUDE on June 06, 2009, 11:45:51 am
Quote from: amachq on June 05, 2009, 11:04:08 pm
can any one tell what was the Answer of bio paper 1 question no 40.
my email is adnan_machq@hotmail.com.reply me there .thankyou
IT WAS SURELY D!! ;D


It was undoubtedly D as the 0xygen level decreases after bacteria decomposition !!!
yupp it was D
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Offline amachq

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Re: IGCSE Biology
« Reply #5 on: June 08, 2009, 11:40:21 pm »
thanks all. i also put d.i am correct.
ok 1 more question was there about transport of gulcose throug which blood vessels.
was it artieries and viens or only arteries
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Offline Incognito_0

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Re: IGCSE Biology
« Reply #6 on: June 09, 2009, 12:04:14 am »
Quote from: amachq on June 08, 2009, 11:40:21 pm
thanks all. i also put d.i am correct.
ok 1 more question was there about transport of gulcose throug which blood vessels.
was it artieries and viens or only arteries
I wrote arteries and veins...
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Offline Fibonacci

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Re: IGCSE Biology
« Reply #7 on: June 09, 2009, 02:02:45 am »
had to be arteries and veins. arteries for supply, veins for reabsorption i think
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Offline thukon

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Re: IGCSE Biology
« Reply #8 on: June 09, 2009, 02:36:34 am »
Its arteries and veins because the glucose does NOT pass out through our urine. Hence, this must mean that it is fully reabsorbed.
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Offline @ce/AJ

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Re: IGCSE Biology
« Reply #9 on: June 09, 2009, 03:55:55 am »
Bio paper 3
How do you measure the dry mass?
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Offline thukon

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Re: IGCSE Biology
« Reply #10 on: June 09, 2009, 05:06:43 am »
lol. I D K!!!!  I wrote measure the amount of water uptaken by the radish and then subtract.
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Re: IGCSE Biology
« Reply #11 on: June 09, 2009, 05:20:06 am »
Quote from: thukon on June 09, 2009, 05:06:43 am
lol. I D K!!!!  I wrote measure the amount of water uptaken by the radish and then subtract.

Heat the radish in a microwave to remove all the water. When all the water from the radish is lost,it can be weighed.to give the dry mass
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Offline QuickSilver

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Re: IGCSE Biology
« Reply #12 on: June 09, 2009, 05:21:24 am »
For The Dry Mass You Should Have Heat It Gently For A Period Of Time Or Keep It In An Oven Or Like Beside A heater to make as much as of the water to evaporate! dont worry i got it wrong too :)

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Offline thukon

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Re: IGCSE Biology
« Reply #13 on: June 09, 2009, 05:21:42 am »
But the experiment is continued after the dry mass is weighed each time. If you het it, wont that kill it? And then the experiment cant be continued.
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Offline QuickSilver

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Re: IGCSE Biology
« Reply #14 on: June 09, 2009, 05:22:57 am »
Quote from: thukon on June 09, 2009, 05:21:42 am
But the experiment is continued after the dry mass is weighed each time. If you het it, wont that kill it? And then the experiment cant be continued.
yeah exactly so the heat should be gentle to make sure it doesnt affect any enzymes or the plant itself :)
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