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BIO PPR 1 V1 <3

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guys what was the answer for the one about how to decrease the water concentration in the urine?

i wrote tempreture=high and activity=low ?
 
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That variation,probably,both can be inherited since height is affectef by environement and height can be inerhited..I did it genes,though..
 
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It was really easy but last year's paper 11 was easier in my opinion because I'm a natural at geography/environmental science. I have 1-2 doubts, mainly the fish question. Was it D (black spot below dorsal fin) or C (no black spot below dorsal fin)? I put D because there was one black spot below a part of the dorsal fin. The question was so unclear, they said 'BLACK SPOT' not 'black spots', does it mean just one huge black spot or a small black spot?

Another thing that got on my nerves was the double human circulatory system, I put C.

A, B and D didn't make sense. But the flow of the diagram of C was weird (the vena cava's direction of flow was on the opposite side --->----

Does anyone know what the double human circulatory system question answer is?
I wrote D
 
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