Biology; Chemistry; Physics: Post your doubts here!

[asma tareen]

my fluke works most of the time in these cases

mubarak

 

[TheStallion-Reborn]

as water is necessary for testa to break open, so increasing the level of water until enough water is absorbed by seed is necessary, and then the seeds may grow

lol....i got it wrong in the mocks too!! Tho the correct ans is A....

iv seen errors often in the ms...my head just cant accept A. A doesnt state addition of water, as most of u are stating, it just says changing water? how on earth is that gon a make a difference?

 

[asma tareen]

iv seen errors often in the ms...my head just cant accept A. A doesnt state addition of water, as most of u are stating, it just says changing water? how on earth is that gon a make a difference?

well maybe it is cux the water is utilezed gr softening the testa

 

[Tulaib]

iv seen errors often in the ms...my head just cant accept A. A doesnt state addition of water, as most of u are stating, it just says changing water? how on earth is that gon a make a difference?

changing mean to see at which level the seeds will germinate

 

[TheStallion-Reborn]

well maybe it is cux the water is utilezed gr softening the testa

it says CHANGING the water...what effect will changing have?

 

[TheStallion-Reborn]

changing mean to see at which level the seeds will germinate

in tht sense it wouldv made sense...but that just isnt what the statement says,,read it again

 

[asma tareen]

it says CHANGING the water...what effect will changing have?

dunno thn

 

[Tulaib]

in tht sense it wouldv made sense...but that just isnt what the statement says,,read it again

luk man, the statment says to change water each day to see if they germinate, s wt it says is to check which water level is best for the seeds to germinate

 

[Tulaib]

in tht sense it wouldv made sense...but that just isnt what the statement says,,read it again

change the water level each day, so we will have one level at which the seeds will germinate

 

[Tulaib]

hey asma n stallion do u guys have any link for bio tips or smthn?

 

[asma tareen]

Biology Notes of All Chapters.Here check this one or anyone u ike from the o levels notes center search there

 

[TheStallion-Reborn]

what exactlt is the difference b/w tissue fluid and blood plasma?

 

[Tulaib]

1. position of blood plasma is in arteries, cappillieies and veins
position of tissue fluid is between cells in tissues

2. protein content of blood is high but tissue fluid is low

3.waste content of blood is low and with tissue fluid it is low in the arterial end but high in the venous end

 

[Tulaib]

Biology Notes of All Chapters.Here check this one or anyone u ike from the o levels notes center search there

is there any other link?

 

[Mustafa Malik]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s09_qp_1.pdf
Plz explain me Q28 n Q30

 

[Tulaib]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s09_qp_1.pdf
Plz explain me Q28 n Q30

Q28_C, as the graph shows the population during each month and there is no information regarding temp in the graph, so the suggestion is not suppportted by the graph

 

[Tulaib]

Q28_C, as the graph shows the population during each month and there is no information regarding temp in the graph, so the suggestion is not suppportted by the graph

Q30_i dun know maself i guess its A maybe, wts the crct ans?

 

[fatima0000]

Q30_i dun know maself i guess its A maybe, wts the crct ans?

its C because in nitrogen cycle nitrifying bacteria makes nitrites and converts them to nitrates

 

[nagina]

I Have practiced only 3 papers for bio paper 1. Is it enough?

 

[ZaqZainab]

this is because ur eyes too have a cornea which acts as a lens with the same properties as camera...our eyes again invert the the image seen..so it seems erect and upright.

thanks
but when we look at an object which is not on Camera for example a table why doesn't our eyes behave like a camera and invert it?
sorry if this question is bothering but i never knew it as i am so Dumb