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Urgent bio mcq help

Xam

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Plz explain these ques to me:

may june 07 ques 1
oct 06 ques 1
 
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J 2007 P1 No. 1
u should convert um into nm...
ans=(15 x 1000)/750 = 20
 
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N 2006 P1 No.1
the width of chloroplast is approximately 4 small divisions on eyepiece graticule...
40 divisions on eyepiece represent 1 stage micrometer division=o.1 mm = 100 um
4 divisions on eyepiece represent: (100/40) x 4=10
 

Xam

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Thanks a ton somaya! thanks a lot.. Really appreciatd.
 
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