Biology; Chemistry; Physics: Post your doubts here!

[luckywang]

explain why most forms of life are completely dependent on photosynthesis?

is it become photosynthesis is the only process convert light energy to chemical energy so all animal is depending on it since we all will die if no photosynthesis process!!!

 

[luckywang]

somebody help me on this two question...
http://www.xtremepapers.com/papers/...nal O Level/Biology (5090)/5090_s10_qp_12.pdf
help me on question 4 and 33!
my answer: 4)A 33)C
why question 4 is not A? potato has certain concentration so it will gain mass if it has lower concentration than it and it will loss mass if concentration is higher?
and why question 33 is not C? 3+2=5?
HELP!!! BIO TODAY!!

 

[Muhammad Asadullah]

how was it?

 

[Doosh Bag]

Tension not. A* aa jai ga.

Moderator Edit : Don't Use Abusive Language

 

[kitecrystal]

what is the weightage of paper 2 in 5090 biology exam?

 

[ahmedyarh]

what is the weightage of paper 2 in 5090 biology exam?

50%

 

[Fallen316]

well, it was Really really easy and thanks to ALLAH ALMIGHTY i nailed it

 

[Dukeofwin]

what is the weightage of paper 2 in 5090 biology exam?

55%(Read it from Syllabus on XP)

 

[fatikhalid]

i m confused abt how to prepare for chemistery atp any suggestions???..

 

[Spidey21]

i m confused abt how to prepare for chemistery atp any suggestions???..

pps
and learn the titration very very well!!

 

[Muhammad Asadullah]

hey.. do they accept answer written on the blankpage...? i crossed one out and wrote it on the blank page.. will they accept it..?

 

[fatikhalid]

pps
and learn the titration very very well!!

i have done pprs from 03 to 11 the markschems for others aren't available!!.. wat more?

 

[Spidey21]

i have done pprs from 03 to 11 the markschems for others aren't available!!.. wat more?

pray
get questions online..
and check you self here
http://www.xtremepapers.com/community/threads/physics-atp-revisionguide.15417/
there are chem notes there as well..

 

[fatikhalid]

pray
get questions online..
and check you self here
http://www.xtremepapers.com/community/threads/physics-atp-revisionguide.15417/
there are chem notes there as well..

thankyou!! are there any specific chapters that i should be preparing?

 

[Spidey21]

thankyou!! are there any specific chapters that i should be preparing?

titration
one moles question comes EVERYTIME
and more practical CHEMISTRY...andpray for all and best of luck

 

[fatikhalid]

titration
one moles question comes EVERYTIME
and more practical CHEMISTRY...andpray for all and best of luck

wat d u mean by "practical CHEMISTRY"..???.. and yea that mole question!! i luv dat one!..

 

[Spidey21]

wat d u mean by "practical CHEMISTRY"..???.. and yea that mole question!! i luv dat one!..

practical as in what happens in a practical...

 

[fatikhalid]

l

practical as in what happens in a practical...

lol thanx!!.. can u tell that of which compounds and elements do i need to know the colors?

 

[Spidey21]

l
lol thanx!!.. can u tell that of which compounds and elements do i need to know the colors?

as many as you can
halogens
group 1 and 2 metals
a few transition metal like copper, iron, etc..

 

[fatikhalid]

as many as you can
halogens
group 1 and 2 metals
a few transition metal like copper, iron, etc..

group 1 and 2 metals are all grey right?