Edexcel GCSE Biology Paper 2 Higher Tier [9th June 2023] Exam Chat

i thought it said ''each lung contains 280 million alveoli, SA for every 1 million alveoli is 0.25 m^2. What is total SA of alveoli in human body?" Isn't the answer 280 x 2 (2lungs) x 0.25 = 140 m^2? Since it's asking for the SA in human body which means both lungs

(please correct me if im wrong)

oh really? i thought it said 280 million for 1 lung and asked for SA in human body?

what did you guys put for how can humans increase the cod population?

what did you guys put for how can humans increase the cod population?

what did you guys put for how can humans increase the cod population?

what did you guys put for how can humans increase the cod population?

what did everyone put for the question on the second page that was like “which part of the stream has a higher biodiversity?” I think the answer was the middle one because of equal levels of nitrates and oxygen but I put E because it had the highest level of oxygen so more organisms could respire :/

what did u guys get for the microscope question ??

what did you guys get for the question where you had to make a practical to investigate light intensity as a limiting factor??

what did everyone put for the question on the second page that was like “which part of the stream has a higher biodiversity?” I think the answer was the middle one because of equal levels of nitrates and oxygen but I put E because it had the highest level of oxygen so more organisms could respire :/

What did you guys get for the question on why tube A was acidic, I said that because it was in the dark, it couldn’t go through with photosynthesis and therefore there was no oxygen produced and had to use anaerobic respiration which produced lactic acid but it was just a guess

What did everyone get for the question where it asked why the athlete breathed more heavily??

To allow for more oxygen and glucose to muscles for increased respiration-more energy for the athlete to keep moving
Idk