A level Biology: Post your doubts here!

[hela]

PLEASE ANSWER

 

[Amy Bloom]

PLEASE ANSWER
View attachment 22248

I think its B.

 

[Amy Bloom]

hey everyone , al salam alaykom . I have a question in p1 year M/J 2003 question 7 . Am i supposed to measure the distance using the scale , convert to micro or nanometres then divide by 5000?

W/salam. i would like to help but my adobe isn't workin properly so can u post the question here?

 

[hela]

I think its B.

no answer is A do not know why

 

[hela]

Ameen
You're welcome.
If u hav more doubts, u can still ask me. I've already completed my A levels.
Thanks 4 ur wishes. god bless you.

can yoyu answer my question on energy flow posted
thanks

 

[strangerss]

W/salam. i would like to help but my adobe isn't workin properly so can u post the question here?

yes sure , but how do I do that :S?

 

[PhyZac]

yes sure , but how do I do that :S?

Asslamu Alikum..!!

In the picture...with a scale you find it is 5mm
now divide tht with magnification.
you will get 0.005mm
now convert to micrometer by multiplying it with 1000
and u get 1.0micrometer.

 

[Amy Bloom]

yes sure , but how do I do that :S?

I think PhyZac brother already answered it. ^^

 

[Amy Bloom]

no answer is A do not know why

Oh yeah so silly of me! *facepalm
The percentage transfer between the Sun and producers is1% (99% is reflected), between the producers and primary consumers is 10% (because some parts of plants cannot be eaten like wood or some are undigestible like lignin which stores a lot of energy), between the primary consumers and secondary consumers is 20% (because most parts can be eaten and few is lost in respiration) and between detritus anddecomposers is 80%.

 

[Soudha Chaudry]

Does any one of you have past pappers from 1995 till 2002 ??
please post them here!!!!!!!

 

[strangerss]

Asslamu Alikum..!!

In the picture...with a scale you find it is 5mm
now divide tht with magnification.
you will get 0.005mm
now convert to micrometer by multiplying it with 1000
and u get 1.0micrometer.

I should put the scale between the two lines given ? thanks a lot for the help GOD bless you.

 

[strangerss]

yeah me too I have problems with plan diagrams , can any help please??

Re: Stuck in Biology?? Post your doubts here!!

Draw a plan diagram...label vascular bundle and palisade layer..!![/quote

 

[Amy Bloom]

yeah me too I have problems with plan diagrams , can any help please??

Hi.
Here are a few things u have to bear in mind:
-For plan diagrams use low power or at most medium power of your microscope.
-Use the high power only when drawing CELLS.
-Use maximum of the space provided to you but do not exceed the space.
-Draw what u see only, no memory-drawing, if u knw what i mean.
good luck

 

[PhyZac]

I should put the scale between the two lines given ? thanks a lot for the help GOD bless you.

The red line in the file.

 

[usman]

A facebook group for Further Maths, intended to remove your doubts and solve your problems. Check it out:-

http://www.facebook.com/groups/furthermathsprodigies/​

 

[Alice123]

can any1 write down similarities n differences between absorption and action spectrum?
thanks in advance

 

[Amy Bloom]

can any1 write down similarities n differences between absorption and action spectrum?
thanks in advance

Hello
Well an action spectrum shows the effectiveness of a pigment to absorb light at different wavelengths of light in stimulating the process (photosynthesis).
An absorption spectrum shows the relative amounts of light absorbed by a pigment at different wavelengths.

 

[strangerss]

Hi.
Here are a few things u have to bear in mind:
-For plan diagrams use low power or at most medium power of your microscope.
-Use the high power only when drawing CELLS.
-Use maximum of the space provided to you but do not exceed the space.
-Draw what u see only, no memory-drawing, if u knw what i mean.
good luck

I have a problem in drawing the tissues , but thanks that was a bit helpful

 

[strangerss]

The red line in the file.

Thanks a lot for posting it

 

[Amy Bloom]

I have a problem in drawing the tissues , but thanks that was a bit helpful

For tissues u just have to draw the outlines, like:

I'm sorry for not drawing neat lines coz i did this on paint. try to do one (by hand) take a photo and upload it, we'll see. Good luck
Hope i helped.
P.S: note its a low power diagram of dicot leaf.