Biology; Chemistry; Physics: Post your doubts here!

[AhsanAfzal]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_w12_qp_11.pdf

i also didnt got this one. did this by ellimination

 

[HarithAslam]

what in

i also didnt got this one. did this by ellimination

elimination?
on what basis did you eliminate the others?

 

[Hskk]

u mean it is wrong in mary jones book?

I use federal bio, and it clearly states, a number of times, that the image is focused on the retina.

 

[AhsanAfzal]

and not before retina?

 

[AhsanAfzal]

when water vapour goes through stomata diffusion occurs or osmosis?

 

[Hskk]

when water vapour goes through stomata diffusion occurs or osmosis?

and not before retina?

Nop, not before it. ON the retina.

Diffusion, because water vapour is a gas, plus, it doesn't pass a partially permeable membrane.

 

[AhsanAfzal]

i searched on google and it meets before retina

 

[Hskk]

http://www.ivy-rose.co.uk/HumanBody/Eye/Eye_Image-Formation.php

It doesn't here. Since its so ambiguous, maybe they'll accept both...they should

 

[AhsanAfzal]

http://www.ivy-rose.co.uk/HumanBody/Eye/Eye_Image-Formation.php

It doesn't here. Since its so ambiguous, maybe they'll accept both...they should

yah

 

[Isha Atiq]

Please can someone help me witn bio atp. like any sort of notes.
I will be obliged

 

[Khadija_1234]

please explain

 

[usama321]

Nop, not before it. ON the retina.

Diffusion, because water vapour is a gas, plus, it doesn't pass a partially permeable membrane.

Though i am not a bio student, i am more than sure that the image formed on the retina is inverted, so i don't understand how that would be possible if the rays don't meet before the retina

 

[asma tareen]

no the dont the lights rays intersect each other and the the rays go on the retina

Though i am not a bio student, i am more than sure that the image formed on the retina is inverted, so i don't understand how that would be possible if the rays don't meet before the retina

 

[usama321]

no the dont the lights rays intersect each other and the the rays go on the retina

that's what i said, MEET instead of intersect

 

[usama321]

Graphs:
Axes: labelled both quantity and unit
labels and quantities to be on correct axes

Scales: must fill at least ½ grid in both directions i.e. cannot be doubled
must be ‘sensible’, i.e. not multiples of 3, 7 etc.
should follow instructions, e.g. start from the origin
should have at least three values marked

Points: allow x, • or
☼
(dot maximum size 1 mm diameter i.e. ½ small square)
must be accurately plotted to ± ½ small square
not awarded if scale not sensible

Line: attempt at single smooth line:
curves need not be perfect!
straight lines - must be drawn with a ruler
- must be best fit i.e. equal number of points above and below line
- must not be skewed, i.e. not points at start/end all above/below the line

TheStallion-Reborn fatima0000

 

[asma tareen]

that's what i said, MEET instead of intersect

before the retina not on the retina

 

[usama321]

before the retina not on the retina

actually Hssk was saying it forms on the retina, and read my post again, i said i don't understand how that is possible, because the image formed is inverted on our retina, so the rays must meet before the retina. Read this

Though i am not a bio student, i am more than sure that the image formed on the retina is inverted, so i don't understand how that would be possible if the rays don't meet before the retina

 

[usama321]

please explain

Tag me too pls, when you get the answer

 

[usama321]

please explain

oops is it from Bio? i thought it might be from physics Please clear that too :O

 

[papajohn]