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A level Biology: Post your doubts here!

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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?
 
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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. (y)
photo-xtreme-png.22248
can yoyu answer my question on energy flow posted
thanks
 
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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.
 
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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%.
 
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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 :D GOD bless you.
 
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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 :)
 
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can any1 write down similarities n differences between absorption and action spectrum?
thanks in advance
 
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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.
 
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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 :)
 
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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:
dicot leaf.JPG
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(y)
Hope i helped.
P.S: note its a low power diagram of dicot leaf.
 
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