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A level Biology: Post your doubts here!

thats_me

thats_me

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DeViL gURl B) said:
Acha tw here's the thing ..

First of all as they've given 0.1 mm which is equal to 100 um
If u count the number of units in between the eye piece graticule.. They are 40 units in total
So that means 40 units = 100 um

Now measure the length as in the units using the micrometer scale given.. That is almost 4 units
Now cross multiply

40 units = 100 um
4 units = x

Answer is 10
Click to expand...
Which question is this?:p
 
thats_me

thats_me

Messages
859
Reaction score
360
Points
73
DeViL gURl B) said:
Acha tw here's the thing ..

First of all as they've given 0.1 mm which is equal to 100 um
If u count the number of units in between the eye piece graticule.. They are 40 units in total
So that means 40 units = 100 um

Now measure the length as in the units using the micrometer scale given.. That is almost 4 units
Now cross multiply

40 units = 100 um
4 units = x

Answer is 10
Click to expand...
Is this the question with nucleus?
 
DeViL gURl B)

DeViL gURl B)

Messages
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DeViL gURl B) said:
Acha tw here's the thing ..

First of all as they've given 0.1 mm which is equal to 100 um
If u count the number of units in between the eye piece graticule.. They are 40 units in total
So that means 40 units = 100 um

Now measure the length as in the units using the micrometer scale given.. That is almost 4 units
Now cross multiply

40 units = 100 um
4 units = x

Answer is 10
Click to expand...
 
Karim Nabil

Karim Nabil

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Snowysangel said:
Isn't histamr released when an antigen binds to an antibody on the mast cell?! Don't the elastic tissues perform the function of recoiling and stretching and bronchi have them...why isn't the trachea folded then? Where is the c=o in glucose? Isn't sucrose diffused I to the drive tube through a cotransport protein??
Click to expand...
Histamine released when pathogen invade mast cells, then immune response stimulated and afterwards, antibody binds with the antigen.
Trachea isn't the site of gaseous exchange, so foldings is not needed.
Revise the straight chain structure of glucose!
No, along with hydrogen ions, sucrose is actively transported to the companion cells via carrier proteins(hydrogen ions are transported by diffusion).... That's why translocation is said to be an active process.
 
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