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the xylems were just 4, 2- line think ovals/circle or whatever you saw on the slide... with 2 of them in contact... and one lumen labelled.
yes I took 5 readings and showed it on "S" , my ratio (in µm) was 295 : 21
yes, it was confusing, took a lot of time to understand
as X was 0.3% so I wrote "low"
so i guess my ratio is right as well as it was 683:61 or something like that.
i also wrote "low" and that it could spill being in an open container.
Overall mean length including shortest and longest as it didn't say to measure widest diameter
Ratio will have a range, I hope it's correct. Arteries have small lumen so it must be Q or R, I selected Q
when relaxed, that's not the case. The best identification of an artery is the inner wall being not smooth. Or the outer wall being thick just like these 2 artery diagrams i have attached.
maybe.. but you won't loose all the marks for the question, if your method to find ratio after wrong means was correct.
so Q or R should be the answer as they had thick outer walls and relatively small lumen than S and T, also S and T had thin outer walls. S and T were like veins/capillaries
As the concentration of X increases, the no. of bubbles of O2 decreases, i didn't have time to do that so I wrote 90 seconds
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