AS Biology P1 MCQs Preparation Thread

[sarahnafea]

PLZ anyone

you cans split diploid into haploid, yes? yes. The question is...can you splid haploid any further? Absolutely not! The only type of division undergone by a haploid organism is mitosis/ asexual reproduction.

 

[Soldier313]

Pressure potential always has a positive value. So X is for pressure potential.
Solute potential always has a negative value. That's shown by curve Z.
Y is left. That has to be for water potential.

y cant u say that Y is solute p and Z is water p ?

 

[Nibz]

y cant u say that Y is solute p and Z is water p ?

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

 

[Soldier313]

A tree carries out photosynthesis and provides organic compounds for other organisms in a forest. It takes carbon dioxide from and returns oxygen to the atmosphere. It takes water from the soil into its roots and its leaves lose water to the atmosphere. Many other organisms live in the tree.
Which term applies to the description of the tree?
A ecosystem
B habitat
C niche
Dtrophic level

 

[XPFMember]

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!

 

[The King XII]

helppppView attachment 12875

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.

 

[XPFMember]

A tree carries out photosynthesis and provides organic compounds for other organisms in a forest. It takes carbon dioxide from and returns oxygen to the atmosphere. It takes water from the soil into its roots and its leaves lose water to the atmosphere. Many other organisms live in the tree.
Which term applies to the description of the tree?
A ecosystem
B habitat
C niche
Dtrophic level

niche...cuz it describes the role of a tree in its environment...

 

[sarahnafea]

y cant u say that Y is solute p and Z is water p ?

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!

 

[Nibz]

A tree carries out photosynthesis and provides organic compounds for other organisms in a forest. It takes carbon dioxide from and returns oxygen to the atmosphere. It takes water from the soil into its roots and its leaves lose water to the atmosphere. Many other organisms live in the tree.
Which term applies to the description of the tree?
A ecosystem
B habitat
C niche
Dtrophic level

Niche.

 

[geek101]

helppppView attachment 12875

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

 

[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