Biology question (1 Viewer)

[anonhello]

how do you answer 2010 multiple choice Q.18. ?
how do you approximate sizes from scaled drawings?
http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2010exams/pdf_doc/2010-hsc-exam-biology.pdf

 

[Aysce]

Wouldn't you just use a ruler and measure the diameter of the virus accordingly with the scale? It should be 130nm using the scale and converting D, hence I think the answer is D.

 

[Kimyia]

Just by looking at it, you can tell the virus would be at least 100nm. So that rules out A and B. Then if 1um = 1000nm, convert 100nm to um by dividing by 1000, gives you around .1um which is close to .130um so the answer would be D.
Hope that's right!

 

[TheOptimist]

Yes that is right, the scale initially reads 1um:1000nm, then you can make it 0.001um:1nm, by using the scale it would be approx 130nm, then we go 0.001x130=0.130um=D