ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

[svenas]

yeahp...

thank u soo much!

 

[Rawanshehs]

awwh...it's okie! do good in paper 1, you will get A* Inshallah

inshallah

 

[svenas]

yeahp...

can u help me in june 96 q36..why A?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

can u help me in june 96 q36..why A?

bio?

 

[svenas]

bio?

yea

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

yea

that is the decay of plants, animals and excretory products...
nitrogen, oxygen and preoteins aren't produced after decay...the only possibility is mineral salts...and i think that is the decay product of plants...

 

[svenas]

that is the decay of plants, animals and excretory products...
nitrogen, oxygen and preoteins aren't produced after decay...the only possibility is mineral salts...and i think that is the decay product of plants...

thnx for reply..one more question in 1996 o/n q7 ....bio...

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

thnx for reply..one more question in 1996 o/n q7 ....bio...

it's diffusion...cuz the membrane is partially permeable so the blue ink can diffuse outside causing the 'pure water' to change in appearance...i.e change to blue!

 

[svenas]

it's diffusion...cuz the membrane is partially permeable so the blue ink can diffuse outside causing the 'pure water' to change in appearance...i.e change to blue!

so for osmosis it must be WATER only through semi-permeable membrane ryt?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

so for osmosis it must be WATER only through semi-permeable membrane ryt?

yeahp...osmosis happens in water ONLY!

 

[Besterlinks]

IGCSE Biology > 2010 > Summer > qp12 > question 16...
Please explain.

 

[Besterlinks]

Which substance is lost from the body by the kidneys, lungs and skin?

Acarbon dioxide
Bexcess ions
C urea
D water

 

[thats_me]

IGCSE Biology > 2010 > Summer > qp12 > question 16...
Please explain.

It will be B , Transpiration is the loss of water ..

 

[Besterlinks]

It will be B , Transpiration is the loss of water ..

Huh? I think you read the wrong question. Please check again

 

[svenas]

yeahp...osmosis happens in water ONLY!

Hiiiii....got one more question in bio jun 1998 q27...Thanks!

 

[thats_me]

Huh? I think you read the wrong question. Please check again

Oops! My bad
Its B , As the amount of energy released is low so the energy remaining in the products is high
the chemical path way is different as all the reactions of anaerobic repiration are not same
Carbondioxide is produced sometimes (like in bread making ,not produced in muscles)

 

[thats_me]

Which substance is lost from the body by the kidneys, lungs and skin?

Acarbon dioxide
Bexcess ions
C urea
D water

Co2 is excreted by lungs only
Urea & excess ions by kidney only
so it's D water is excreted by all of them

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

Hiiiii....got one more question in bio jun 1998 q27...Thanks!

Assalam-o-alaikum wr wb...
sorry but i am not sure about that...may be someone else can help you!
but i 'think' it's cuz it's written 'man' and y chromosome is definately present...makes sense?

 

[svenas]

Assalam-o-alaikum wr wb...
sorry but i am not sure about that...may be someone else can help you!
but i 'think' it's cuz it's written 'man' and y chromosome is definately present...makes sense?

maybe cauz they said NUCLEUS ryt? Anyway...if u will have any idea about it tell me....
one more question in 1999nov bio q8?

 

[L.V.D]

Jazakallah Khair cool crysrals

your the best