Author Topic: Biology help HERE ONLY!!  (Read 8500 times)

Offline °o.O-hash94-O.o°

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Re: Biology help HERE ONLY!!
« Reply #15 on: May 23, 2009, 04:53:44 pm »
here is a very useful website for the biology

http://revisioncentre.co.uk/gcse/biology/index.html it includes many good topics...........

http://www.s-cool.co.uk/gcse/biology.html

this also

thanks it will be helpful for all   8) 8) 8)




Offline amachq

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Re: Biology help HERE ONLY!!
« Reply #16 on: May 23, 2009, 08:50:36 pm »
Thank's all for the comments.

Offline Maheen

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Re: Biology help HERE ONLY!!
« Reply #17 on: May 24, 2009, 09:08:28 am »
Thank u v.v.much amachq n hash094!!! +rep to u both  ;)

Offline °o.O-hash94-O.o°

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Re: Biology help HERE ONLY!!
« Reply #18 on: May 24, 2009, 07:30:15 pm »
Here is a great free revision guide for biology

http://www.crampuppy.com/1/IGCSE/biology/

always there to help students!

thanks

Offline someone

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bio paper 5
« Reply #19 on: May 25, 2009, 10:02:51 am »
what should i need to know for bio paper 5(practical)?  ???

i really dont know wat to prepare, could anyone give some tips?  ???

thx  ;D

(n could any1 also give tips for other sciences practicals? thx)

« Last Edit: May 25, 2009, 10:05:22 am by someone »

Offline °o.O-hash94-O.o°

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Re: bio paper 5
« Reply #20 on: May 25, 2009, 10:17:24 am »
well,these tips r not from me but from examiner!

I think it might help u!

http://www.cambridgestudents.org.uk/subjectpages/biology/igcsebiology/Examiner_Tips_for_IGCSE_Biology_0610_FINAL.pdf

thanks

Offline amdoo

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Re: Biology help HERE ONLY!!
« Reply #21 on: May 26, 2009, 10:36:23 am »
I NEED NOTES FOR LYMPHATICS!!

PEOPLEEEEEEEE

HELP MEEEeeeeHH

nid404

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Re: Biology help HERE ONLY!!
« Reply #22 on: May 26, 2009, 11:27:33 am »
for our syllabus this is all we need to know. Lymphatic system is really complicated if u try goin' into details. So here it is
Three functions
-The return of tissue fluid to the blood in the form of lymph fluid. This prevents fluid build-up in tissues.
-The production of lymphocytes(very imp). These r made in the lymph glands such as the tonsils, adenoids and spleen. The glands become more active during the time of an infection because they r producing and releasing large no of lymphocytes.
-The absorption of fatty acids and glycerol from the small intestine. Each villus contains a lacteal- a blind ending lymph vessel which absorbs the fatty acids and glycerol.

This is all u need to know. Don't get urself confused by trying to unlock the whole working of the lymphatic system. It's there in detail in the A levels. For now this is it. Hope uve got the functions.

Offline SGVaibhav

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Re: Biology help HERE ONLY!!
« Reply #23 on: May 26, 2009, 11:34:01 am »
hey more doubts
 :D
what all do we need to know, i mean what all do we need to know to make from these
i mean what all anaerobic stuff are we supposed to make?
wine, beer, cheese, yogurt, bread, what all?

just wanted to know that and also if someone had links to make these, if would be good.
i hate this part the most.

Offline SGVaibhav

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Offline AS girl

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Re: Biology help HERE ONLY!!
« Reply #25 on: May 26, 2009, 11:58:30 am »
Thanks  ;) useful pal!
If i fall along the way pick me up and dust me off...and if i get too tired to make it..be my breath so i can walk!!

nid404

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Re: Biology help HERE ONLY!!
« Reply #26 on: May 26, 2009, 12:02:51 pm »
hey more doubts
 :D
what all do we need to know, i mean what all do we need to know to make from these
i mean what all anaerobic stuff are we supposed to make?
wine, beer, cheese, yogurt, bread, what all?

just wanted to know that and also if someone had links to make these, if would be good.
i hate this part the most.

We have yoghurt making, baking, brewing

   Yeast can respire without oxygen, fermenting sugars to produce carbon dioxide and alcohol.
   
   In baking:
   -a mixture of yeast and sugar is mixed with bread dough;
   -the mixture is left in a warm place;
   -carbon dioxide, produced by the yeast respiration, causes the bread to rise;
   -the bread is then baked.
   
   In the production of yoghurt:
   -a starter culture of bacteria is added to warm milk;
   -the bacteria ferment the milk sugar (lactose), producing lactic acid;
   -lactic acid causes the milk protein to form a solid material.
   
        Brewing
        -Yeast respires sugar to form ethanol and CO2
        -The source of sugar is usually fruit juice or grain
        -The ethanol makes the drink alcoholic; carbon dioxide gives the drink its fizz. The process is called fermentation





Offline SGVaibhav

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Re: Biology help HERE ONLY!!
« Reply #27 on: May 26, 2009, 12:09:31 pm »
wow only these 3
 great
other wise i would have spent time learning that cheese and ughh other boring stuff

thanks for the explanation
+rep

so basically brewing makes alcoholic drinks such as wine, beer etc ...

Offline lil^$tar

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Re: Biology help HERE ONLY!!
« Reply #28 on: May 26, 2009, 01:09:43 pm »
da help was gud
a* in all subjects

Offline SGVaibhav

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Re: Biology help HERE ONLY!!
« Reply #29 on: May 26, 2009, 02:45:49 pm »
Can anyone describe the structure of a motor neuron and a sensory neuron.
Not the whole part, only about axons-dendrons-dendrites.



there was a question in that past papers
A motor neuron was given
State two features that distinguish it from other types of nerve cell.

Answer:
Its cell body is terminal.
Has long axon

OR

It has motor end plates
It has many dendrons and dendrites


I have highlighted the parts which i dont understand