AS Biology P1 MCQs Preparation Thread

[Soldier313]

Well the answer is D correct me if I'm wrong, okay explanation "W.p of cell = Pressure.p + solute potential".

okay so in the middle we have incipient plasmolysis you have to check the images for this, at this point, pressure potential is zero and both the water potential and solute potential are negative always (remember that solute potential can never be positive alright) so follow the equation at incipient plasmolysis water potential of cell = solute potential. lets go to turgid the water potential is zero why know since pressure potential can become more positive (it can exceed zero) WHEN THE CELL IS TURGID, and like i said the solute potential is always negative so "W.P of cell = 3.5-3.5" which is zero so "-" is for the solute potential and "+" is for the pressure potential and that only occurs when turgid okay, so W.p of cell is 0.

JazakAllah that really helped thanx a lot bro

 

[The King XII]

first of all thanks. second, ur basically saying that if cohesion-tension forces increase as a result of increased transpiration during the day..girth DEcreases>\?

Well done that's exactly what i'm saying.

 

[Soldier313]

aoa wr wb
first time....did i ever have the feeling...there's been help for bio

Anyway....thanks a lot to alll....!

Ya Allah...plz grant success in both worlds to all those who helped...and those who couldn't ....Aameen...YaAllah guide us all..to Jannah...and make us among the muttaqeen and saliheen...aameen!

wassalamoalaikum warehmatullahi wabarakatuh!

it seems like you are all prepped up for bio

 

[Soldier313]

remember this... Ψ = Ψs + Ψp
and the pressure potential is always positive so X is pressure potential
now looking at the equation we know water potential is always negative, but solute potential has to be even more negative, cuz the pressure potential will be added to it, therefore Z is solute potential and Y is water potential

tx that really helped

 

[Soldier313]

Solute Potential is obviously more negative as it contains solutes. Water potential is WATER potential. Lol...which means less/no solutes...which means less negativeor closer to zero!

lol okay...thanx

 

[sarahnafea]

merciii good luck to u !

Well done that's exactly what i'm saying.

 

[XPFMember]

it seems like you are all prepped up for bio

not really...will do it tom morning going now...
just did a few papers...Ya Allah help us all...aameen

 

[Nibz]

aoa wr wb
first time....did i ever have the feeling...there's been help for bio

 

[Soldier313]

not really...will do it tom morning going now...
just did a few papers...Ya Allah help us all...aameen

ameen.......g'luck faith and hardwork will definitely pay off inshaAllah

 

[Soldier313]

Common sense.
Y is almost touching the x-axis. Z is never gonna meet the x-axis anytime soon.

the common thing about common sense is that it is not very common

 

[XPFMember]

i mean...instant help...seriously....today....every single question i posted was cleared alhumdulilah...

It isnt the case always...
though can't obv forget 'ur' help..in my 'A2' .....May Allah reward u loads for that....aameen

 

[The King XII]

JazakAllah that really helped thanx a lot bro

lol Alhamdulilah you got it.

 

[Nibz]

i mean...instant help...seriously....today....every single question i posted was cleared alhumdulilah...

It isnt the case always...
though can't obv forget 'ur' help..in my 'A2' .....May Allah reward u loads for that....aameen

I was kidding.

 

[The King XII]

Well the net size i presume would be the size of the organisms themselves 7mm= earthworms and beetles
0.5 mm: small invertebrates
0.03mm: microorgansims

now look t the question "most important for breaking down", obviously the the ones with greatest difference 100-6=94, so this falls on 7mm wich are earthworms and beetles.

 

[geek101]

Oh oh a huge GOOD LUCK to all ya people who posted on this forum! Agree, it was great help! InshaAllah the exam tomorrows gonna be ABC peeps!

 

[sarahnafea]

okay look imagine Tom and Jerry. (I'm assuming u know who they are) Tom is the big scavenger and the little hole in the wall (mesh) is where Jerry hides. Now Tom can't squeeze his giant head into that teeny weeny little hole now can he? So who is it that can catch Jerry? any organisms that are smaller than the diameter of the hole(7mm). Same thing with the question..only small earthworms and beetles can cause the most damage. Big things come in small packages

heeeellpppppp

 

[Soldier313]

okay look imagine Tom and Jerry. (I'm assuming u know who they are) Tom is the big scavenger and the little hole in the wall (mesh) is where Jerry hides. Now Tom can't squeeze his giant head into that teeny weeny little hole now can he? So who is it that can catch Jerry? any organisms that are smaller than the diameter of the hole(7mm). Same thing with the question..only small earthworms and beetles can cause the most damage. Big things come in small packages

looooooooooolll u made my day! and thanx

 

[Soldier313]

Oh oh a huge GOOD LUCK to all ya people who posted on this forum! Agree, it was great help! InshaAllah the exam tomorrows gonna be ABC peeps!

G'luck to you too....inshaAllah it will be a piece of cake

 

[Capricedcapri]

Any idea how to solve McQ 39 of oct nov 2011 variant 12

 

[sarahnafea]

no problemm..what's a world without laughter? Goodnight and goodluck people.

looooooooooolll u made my day! and thanx