Biology; Chemistry; Physics: Post your doubts here!

[luckywang]

bacterium: singular
bacteria: plural

oo... thank you...
and i wan to ask this too...
is calcium and vitamin D help in foetus's teeth development coz is a new-born baby having teeth?

 

[Fallen316]

oo... thank you...
and i wan to ask this too...
is calcium and vitamin D help in foetus's teeth development coz is a new-born baby having teeth?

it helps ONLY in making the baby's bones.

 

[luckywang]

it helps ONLY in making the baby's bones.

no teeth growth and only bone growth, right? are you sure wan to overwrite saved date? -> yes! -> saving.... dont unplug charger during saving........... save completed! thanks!

 

[NIM]

ME tooooooooooo

nyc

 

[Spidey21]

oo... thank you...
and i wan to ask this too...
is calcium and vitamin D help in foetus's teeth development coz is a new-born baby having teeth?

just like Fallen316
said it helps in just making the bones...

 

[luckywang]

boiling potato will let the cell membrane become more permeable or destroy it directly and let it become filly permeable? can this theory apply to all cell membrane or only potato?

 

[Umar Ilyas]

http://www.xtremepapers.com/papers/...onal O Level/Biology (5090)/5090_w09_qp_2.pdf
Q.5(D) can someone please give a rough sketch of how the graph's supposed to be?

 

[Amber]

boiling potato will let the cell membrane become more permeable or destroy it directly and let it become filly permeable? can this theory apply to all cell membrane or only potato?

if you boil any cell, the cell membrane is destroyed and it becomes fully permeable

 

[Amber]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Biology (5090)/5090_w09_qp_2.pdf
Q.5(D) can someone please give a rough sketch of how the graph's supposed to be?

 

[Spidey21]

boiling potato will let the cell membrane become more permeable or destroy it directly and let it become filly permeable? can this theory apply to all cell membrane or only potato?

its the same thing
destroying makes it more permeable..

 

[Umar Ilyas]

But May I ask if we labelled the axes the other way around, with O2 release above, would the inverted graph also be right?
THAnks

 

[Amber]

But May I ask if we labelled the axes the other way around, with O2 release above, would the inverted graph also be right?
THAnks

im not sure but u myt lose one mark

 

[Tayyab Muzafar]

What is the difference between natural and artificial selection?

THANKS

 

[snoonono]

a

THANKS

anytime

 

[Tayyab Muzafar]

Can any one name ALL the functions of the which the liver carries out.....!!!

 

[sedanx]

boiling potato will let the cell membrane become more permeable or destroy it directly and let it become filly permeable? can this theory apply to all cell membrane or only potato?

The proteins in the cell membrane denature at a high temperature, leaving gaps and making the membrane more permeable, so substances diffuse in or out of the cell easier.
This is applicable for all the cells.

 

[Amber]

Can any one name ALL the functions of the which the liver carries out.....!!!

converts excess glucose to glycogen for storage
converts excess amino acids to urea (deamination)
destroys hormones
removes alcohol from blood

 

[sedanx]

But May I ask if we labelled the axes the other way around, with O2 release above, would the inverted graph also be right?
THAnks

Very important: the "independent variable" is represented on the "left hand column" of a table and x-axis in a graph.

 

[Spidey21]

Can any one name ALL the functions of the which the liver carries out.....!!!

1.Deamination
2.Detoxification
3. Breaking down of haemoglobin to for iron in spleen
4. glucose level control
5.formation of bile

 

[Tayyab Muzafar]

converts excess glucose to glycogen for storage
converts excess amino acids to urea (deamination)
destroys hormones
removes alcohol from blood

THANKS... but aren't emulsification of fats and break down of RBC's also functions?