Biology; Chemistry; Physics: Post your doubts here!

[multixamza01]

H2 bonding is outta our syllabus.

 

[KumaiL JavaiD]

See the Examiner Tips and practice maximum past papers.

you mean examiner report?

 

[KumaiL JavaiD]

hmmm thanks

u dont have to be confused guy it is the easiest of all the papers theory paper is the hardest... just practise past papers and make sure that u learn graphical analysis of number of chapters such as kinematics waves electricity... electricity and waves come frequently so have a good command in these chapters wish yeah all the best

 

[aleezay]

bio: what is potassium's role in humans? is it only needed for blood clotting or something else too?

 

[scouserlfc]

bio: what is potassium's role in humans? is it only needed for blood clotting or something else too?

Is it even in syllabus and if it is i remember its gotta do something with nervous functioning and osmotic presssure in the body will confirm it was written in my chem book

 

[aleezay]

Bio (again =)) : for cloning in animals,sheep for example, what is the advantage of introducing the daughtr cell in tto he uterus of a surrogate mother's uterus instead of the sheep to whom the daughter cell belongs?

Physics: how do we charge metals by conduction?

 

[aleezay]

​

Is it even in syllabus and if it is i remember its gotta do something with nervous functioning and osmotic presssure in the body will confirm it was written in my chem book

thnx in advance =)

 

[batool]

(Biology Theory)
Has the marking of Section B and Section C changed? I mean first there used to be 2 questions in section B and there was no section C and there was choice. So has the criteria changed cuz i noticed this in the latest papers.

 

[CaptainDanger]

(Biology Theory)
Has the marking of Section B and Section C changed? I mean first there used to be 2 questions in section B and there was no section C and there was choice. So has the criteria changed cuz i noticed this in the latest papers.

Yes they have made the changes...

 

[nightmaressana]

this may sound like an extremely lame question but how do we know if a salt is acidic of basic?

 

[abcde]

this may sound like an extremely lame question but how do we know if a salt is acidic of basic?

Salts are generally neutral compounds except for carbonates, which are considered acidic. Anything that has the ability to donate hydrogen ions in a solution is an acid whereas an alkali donates hydroxide ions. Bases are metal oxides or hydroxides.

 

[Ahmedm96]

bio how can i improve my drawing 2-cant understand the villi and plant nutrtion

 

[scouserlfc]

bio how can i improve my drawing 2-cant understand the villi and plant nutrtion

For drawings make sketches of the image like the villi,artery,vein and etc strictures just remember u dont require ur drawing to be top notch like an artist a small sketch works

 

[abcde]

bio how can i improve my drawing 2-cant understand the villi and plant nutrtion

Just a few points:
-> Make a large drawing. At least 7 cm wide.
-> Use a sharp pencil. Avoid broken or fussy lines. Shading is generally discouraged.
-> Give a heading to your drawing to show what is represents.
-> Give plenty of clear labels.

 

[snowbrood]

why are alcohols neutral?? they have OH ions and are soluble so why are they not alkalis

 

[scouserlfc]

why are alcohols neutral?? they have OH ions and are soluble so why are they not alkalis

Hello dude, they are not called Hydroxide ions,they are called hydroxyl groups which are attached to the hydrocarbon structure,they are a functional groups and are not ionic in structure like their friends hydroxide which combine with inorganic molecules while hydroxyl goes with organic molecules !

 

[hassankhan]

Can anyone help me with physics nov 2010 ATP q 4

 

[CaptainDanger]

Can anyone help me with physics nov 2010 ATP q 4

Paper 41 or 42?

 

[Monojit Saha]

It is the interchange between potassium and sodium ions that causes a nerve impulse,, so it is very important for the body,,

 

[Monojit Saha]

Can any one help me with this MCQ???It is Biology Paper- ON 2008P1 Q12