ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

[сᴏᴏʟ сяуѕтᴀʟѕ]

Thanks!!!

Your welcome

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

uhmm golden = must be homozygous recessive? How can it be Bb....

Assalamoalaikum wr wb!
Bb is for children...not their parents..mother is golden which means must be homozygous recessive and when the chlod is black it means that one recessive allele must be present in him/her

Hope It clears your doubt!

 

[Rahma Abdelrahman]

yea yea yea it an organ because it has many tissues for e.g cornary artrey , renal artrey, pulmonary artry>>>>>>>so on

Yes, it is an organ , but aren't you contradicting yourself here????
You said because it has many tissues for e.g coronary ARTERY, renal ARTERY, pulmonary ARTERY!
No, the different tissues are muscular tissue, connective tissue,..... !

 

[svenas]

A* Inshallah....
bcoz the threshold is not that high..so losing 30 marks will give an A* INSHALLAH!

HI ....plz help me in this http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Biology (0610)/0610_w10_qp_11.pdf questions 27 and 34
plz urgent...
thanks!

 

[Rahma Abdelrahman]

plz may june 2002 question 37 PLZ PLZ PLZ i wana ana answer BIO is 2morrow i am very nervous about tthe answer

It is D, Observe the y-axis label-per THOUSAND of population, and it is the birth rate, SO 41/1000, 26/1000, 35/1000 and 18/1000...18 is the smallest indicating the least birth rate so least population growth....
hope this helps !

 

[Rahma Abdelrahman]

HI ....plz help me in this http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Biology (0610)/0610_w10_qp_11.pdf questions 27 and 34
plz urgent...
thanks!

For Q 27, i believe it is B, as sperms die before egg is released.
For Q 34, it is D, as energy is lost, a food chain will not support more than 5 trophic levels.
Wish this helps, any more questions?

 

[svenas]

For Q 27, i believe it is B, as sperms die before egg is released.
For Q 34, it is D, as energy is lost, a food chain will not support more than 5 trophic levels.
Wish this helps, any more questions?

Thanks....see this one http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Biology (0610)/0610_w11_qp_11.pdf questions 19 and 34 plz!

 

[svenas]

Thanks....see this one http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Biology (0610)/0610_w11_qp_11.pdf questions 19 and 34 plz!

for question 19 .....sodalime will absorb co2 in atmosphere and cauz rise in fall....y this option is not available plz explain!?

 

[Rahma Abdelrahman]

for question 19 .....sodalime will absorb co2 in atmosphere and cauz rise in fall....y this option is not available plz explain!?

For 19, I do not understand what do u exactly mean, but here: At X, the cells are ALIVE and provided with suitable conditions so they respire releasing CO2 which is absorbed by the soda lime and so level X rises, but for Y the cells are dead i.e. no respiration and no photosynthesis so no change in level Y! (there is very less CO2 in the air around the seeds to be absorbed; it will not cause a change!)
Q34, 1 is photosynthesis ( directly pointing to plant), 2 is feeding ( consumers eat other organisms) while 3 is respiration (energy lost to atmosphere) so it is C...
Any more?

 

[svenas]

For 19, I do not understand what do u exactly mean, but here: At X, the cells are ALIVE and provided with suitable conditions so they respire releasing CO2 which is absorbed by the soda lime and so level X rises, but for Y the cells are dead i.e. no respiration and no photosynthesis so no change in level Y! (there is very less CO2 in the air around the seeds to be absorbed; it will not cause a change!)
Q34, 1 is photosynthesis ( directly pointing to plant), 2 is feeding ( consumers eat other organisms) while 3 is respiration (energy lost to atmosphere) so it is C...
Any more?

If I've more I'll message u...thx!

 

[Rahma Abdelrahman]

If I've more I'll message u...thx!

Most welcome , when is ur exam & which variant are u taking?

 

[MARWA 1234]

Sorry, i don't have hotmail

ok what do u have so i can add u

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

for question 19 .....sodalime will absorb co2 in atmosphere and cauz rise in fall....y this option is not available plz explain!?

For 19, I do not understand what do u exactly mean, but here: At X, the cells are ALIVE and provided with suitable conditions so they respire releasing CO2 which is absorbed by the soda lime and so level X rises, but for Y the cells are dead i.e. no respiration and no photosynthesis so no change in level Y! (there is very less CO2 in the air around the seeds to be absorbed; it will not cause a change!)
Q34, 1 is photosynthesis ( directly pointing to plant), 2 is feeding ( consumers eat other organisms) while 3 is respiration (energy lost to atmosphere) so it is C...
Any more?

Assalam-o-alaikum wr wb...
for the 19th one...the level rises bcoz the germinating seeds take in Oxygen...as the gas decreases in the tube the level of X rises...
but the dead cells don't need Oxygen so the level remains the same...
hope you get it

 

[Rahma Abdelrahman]

Assalam-o-alaikum wr wb...
for the 19th one...the level rises bcoz the germinating seeds take in Oxygen...as the gas decreases in the tube the level of X rises...
but the dead cells don't need Oxygen so the level remains the same...
hope you get it

I believe it can be explained in both ways ?

 

[MARWA 1234]

Yes, it is an organ , but aren't you contradicting yourself here????
You said because it has many tissues for e.g coronary ARTERY, renal ARTERY, pulmonary ARTERY!
No, the different tissues are muscular tissue, connective tissue,..... !

thanks>>>

 

[MARWA 1234]

Assalam-o-alaikum wr wb...
for the 19th one...the level rises bcoz the germinating seeds take in Oxygen...as the gas decreases in the tube the level of X rises...
but the dead cells don't need Oxygen so the level remains the same...
hope you get it

after how many hours is ur bio exam

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

I believe it can be explained in both ways ?

the thing is that...in respiration it releases CO2 which is absorbed by the soda lime, immediately so no 'exchange' of gases takes place...causing the level to stay in the same position! but here...it is using up oxygen that's why level is rising!

don't mean to offend you btw...

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

after how many hours is ur bio exam

Assalam-o-alaikum wr wb..
i am giving variant 1.

 

[svenas]

the thing is that...in respiration it releases CO2 which is absorbed by the soda lime, immediately so no 'exchange' of gases takes place...causing the level to stay in the same position! but here...it is using up oxygen that's why level is rising!

don't mean to offend you btw...

but co2 in atmosphere is absorbed ryt?

 

[сᴏᴏʟ сяуѕтᴀʟѕ]

but co2 in atmosphere is absorbed ryt?

the test tubes are closed...therefore CO2 of atmospher doesn't matter!