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IGCSE Biology Paper 3

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flutterby:
I think I did a different variant because dere was nothing about dry mass in my paper( i did Variant 1)
Wat was da answer to the nitrogen cycle processes???? ???
I wrote nitrogen fixation for the first 1 and
          ii)decomposition
             nitrification

mido_276:
I ALSO DID THAT AND I WAS COMPLETELY SURPRISED BUT ALSO HORRIFIED ABOUT THE DRY MASS QUESTION AS I FOUND NOTHING ABOUT IT
AND ABOUT 2 PROCESS  I WROTE PUTREFICATION WHICH STANDS FOR DECOMPOSITION U WROTE AND NITRIFICATION

molii:
i hv probably made the stupidest mistake evr!!!!!!!
uurrggghhh
curses!!!!
 :'(

i wrote cell wall instead of cell membrane.. nd guess wad?? i noticd.. nd as soon as i noticd.. the invigilator was like... "candidates, put uR pens down"

 :'(

the bio paper was excrutiatingly long... i hardly got any time to check..
i hd 25 mins left.. i counted hw many questions i hd left nd there were 5.. nd suddenly i notice.. there is a whole new question behind tht.. i hardly got time to read the last question properly altho it was kinda easy....


:'(
it was longer than physics..  >:(

MissDE:
The exam was HARD!

aquarian93:

--- Quote from: QuickSilver on June 09, 2009, 06:50:42 am ---
--- Quote from: IG_ICE09 on June 09, 2009, 06:44:53 am ---if u remember the last question, first subquestion which had sumthin "Suggest three reasons why not all the energy in the wheat crop is available in animal feed" or sumthin like that i wrote:

1) not all the sunlight available to the wheat crop is used by it
2) animal may not eat all of the wheat crop , some of it is undigested
3) wheat crop may use some of its energy for respiration i.e. for growth or active transport

does that make sense?

overall i thot the questions had too many marks! all 3,4, 5 mark questions..loads of questions were overmarkd n were given like 4 or 5 marks..nyway for the table in the first question, i ticked "Scales/scaly skin" for birds, as all textbooks say birds have scales on their feet, but many ppl in my class sed u didnt hav 2 tick it!

--- End quote ---
Hey

I cant jude really if what you wrote is correct or not, but it seems ok
This is what I wrote:
1-Some energy is used by the wheat for itself and the process carried out in the plant itself
  
2-Some Tiny unwanted animals or insects such as rats or cockoraches may be feeding on the wheat too thus                                                                                                            
         reducing the total energy available for the animals

3-Some energy is wasted when it is flowing through the food chain i.e from the plant to the animals in the form of                                            heat


And YEAh ur  right tooo many marks for even small quesations

and for the birds YOU HAVE TO TICK THE SCALES IT IS CORRECT SCALES FOR BIRDS ARE CORRECT


Hope I Helped :)

--- End quote ---

1 and 3 is same wid me :) i hope its rite? :)
i think the other thing i rote, dusnt make sense, so i think ill get 2 marks for it.

the sickle cell anaemia question and energy question in the last page was 5 marks each, it was long and i ws in a hurry, so im scared ill lose a few marks, bt yea i no my answers make sense bt if i had more time, i would explained it better, get wat i mean

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