Biology; Chemistry; Physics: Post your doubts here!

[ashiqbal]

first heat the non-reducing sugar in HCl..this will break it down to REDUCING SUGAR
then add NaOH to neutralise it
then perform the benedict's test

Is this even included in our syllabus?

 

[SilverCrest]

these points will come:
-cut open anther with scalpel
-add dye to pollen grains eg: iodine solution or methylamine blue
-sandwich some pollen between cover-slips
-hold cover-slips together by elastic bands
-make sure there are no air bubbles by lowering cover-slips at angle/remove any air bubbles
-place cover-slips on glass slides

please correct me or add any point missing.

the examiner report says we don't have to cut the pollen grains..?

 

[SilverCrest]

Is this even included in our syllabus?

it came in a past paper.I dont have the year coz my sir gave it to me as a worsheet

 

[Talhakhan]

How to label a cross section of a fruit..... In some cases they say pericarp is the outer most layer ... In other cases epicarp is outer most then mesocarp than pericarp .... Very confused plz help :-@

 

[ashiqbal]

How to label a cross section of a fruit..... In some cases they say pericarp is the outer most layer ... In other cases epicarp is outer most then mesocarp than pericarp .... Very confused plz help :-@

lets hope we dont get that particular drawing, but the layers are as folows:
deepest=pericarp
less deep=mesocarp
outer=epicarp

 

[Ifrah Jackson]

you cant !
they aren't made!
sciences are unpredictable .

okay thankx

 

[Spidey21]

lets hope we dont get that particular drawing, but the layers are as folows:
deepest=pericarp
less deep=mesocarp
outer=epicarp

yes it is exactly like that and

How to label a cross section of a fruit..... In some cases they say pericarp is the outer most layer ... In other cases epicarp is outer most then mesocarp than pericarp .... Very confused plz help :-@

it depends what they ask you to label..if they ask you for Epicarp then you label the pericarp deep but otherwise you mark it outside..i guess..

 

[Spidey21]

How to label a cross section of a fruit..... In some cases they say pericarp is the outer most layer ... In other cases epicarp is outer most then mesocarp than pericarp .... Very confused plz help :-@

http://upload.wikimedia.org/wikiped...m-en.svg/250px-Drupe_fruit_diagram-en.svg.png

this will help i guess..

 

[Talhakhan]

Are there only two questions in bio ATP cuz in 2011 nov/dec there were only 2 questions in it.........

 

[Talhakhan]

http://upload.wikimedia.org/wikiped...m-en.svg/250px-Drupe_fruit_diagram-en.svg.png

this will help i guess..

So this means pericarp is the name of the combined all three layers......

 

[Spidey21]

So this means pericarp is the name of the combined all three layers......

yeah...

 

[Spidey21]

Are there only two questions in bio ATP cuz in 2011 nov/dec there were only 2 questions in it.........

there are moslty 3 if you look in the pps...they could have made an exception or change the amount of questions since then...

 

[Ifrah Jackson]

epicarp is the outer layer, pericarp is the fruit pulp

 

[falcon678]

Are there only two questions in bio ATP cuz in 2011 nov/dec there were only 2 questions in it.........

well 2 or 3 questions can come...depends on papr...!!!

 

[ayeshaK]

How to label a cross section of a fruit..... In some cases they say pericarp is the outer most layer ... In other cases epicarp is outer most then mesocarp than pericarp .... Very confused plz help :-@

http://www.extension.org/pages/55716/pericarp hope this helps

 

[Talhakhan]

there are moslty 3 if you look in the pps...they could have made an exception or change the amount of questions since then...

Man i have done the past papers from 2000-11...... My concepts are also 95% clear .....Is my preparation alrite.....
What should i do now cuz i've heard there is no need to do papst papers from 90's any more ....... )

 

[Talhakhan]

http://www.extension.org/pages/55716/pericarp hope this helps

This did help alot..... Thank u...

 

[Spidey21]

Man i have done the past papers from 2000-11...... My concepts are also 95% clear .....Is my preparation alrite.....
What should i do now cuz i've heard there is no need to do papst papers from 90's any more ....... )

umm..you can never say nuf cuz thats when the S!@# happens if you know what i mean...

 

[Spidey21]

http://www.extension.org/pages/55716/pericarp hope this helps

we shared the same picture from different links....

 

[Talhakhan]

umm..you can never say nuf cuz thats when the S!@# happens if you know what i mean...

Probably ur rite there is never nuf if ur in o'levels S!@t that makes me feel mad....... :-/