Quiz.

  • Thread starter Thread starter Bodd
  • Start date Start date
Ok. What’s the main cause of our blood being red. & things like cuttlefish (I think) octopus etc having blue blood.
spiders, and some sea creatures, do not have red blood, because it is not iron based, but copper.

I will guess that octopuses are the same, and the blood is actually dark green or blue (but never red) depending on what the copper compound is.
 
Well done JD.
Iron equals red blood . Copper equals blue blood.
( crudely put)
 
very easy one

what is the connection between playing croquet, and dying?
 
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