Edexcel biology paper 2 unofficial markschemeWatch
-I got the heart rate to be 70bpm
-the left ventricle for the multiple choice on cardiac output
-The iguana questions were i explained how as temp increased so did oxygen consumption and then talked later on about how the enzymes involved in the metabolic processes of respiration work quicker ans so on.Then by breathing the iguana releases energy to the surroundings
-Nitrogen fixing bacteria in the root nodules of legumes convert N2 into nitrates which the plant can use as they're essential to growth ect
-Nitrogen ions absorbed by active transport through the roots of the seedling
-The hazard symbol is oxidising
-6 mark questions are in a way self-explanotory
What did you guys put for the elasticity of arteries question?
I was not too sure on the elasticity of arteries i wrote something kinda dumb. I put something along the lines of measuring the height of the artery before, then place 10g of weight which would stretch the artery, and each time remove the weights and take note if it gone back to its original height.