(a(i))[2]
State two structural differences between a fish heart and a human heart.
(a(ii))[1]
Draw a ring around the correct words to finish the sentence below. higher than / the same as / lower than The blood pressure in a fish aorta will be [BLANK] the blood pressure in a human aorta.
(b(i))[1]
State which component of human blood is absent from Antarctic icefish blood.
(b(ii))[5]
Suggest how Antarctic icefish with colourless blood can survive in the low temperatures of the Antarctic Ocean.