↑↑↑ In the poll above, an answer like '> 30%' would mean between '30%' and '40%' ↑↑↑Remember a question? Post your answers below.Follow me and I will try and post the answers for the Chemistry and Physics exams on Wednesday and Friday. This mark scheme is not official and was made purely from what we saw in the exam.
AQA B2 Higher - Unofficial Mark Scheme (Updated Regularly) (Should have the last few questions of foundation)
1. Athlete Question
a)
i) Anaerobic means respiration without oxygen
ii) The athlete was running for 1.5 minutes.
b)
How do you know it was anaerobic respiration? The athlete produced lactic acid
2. Pond Weed Question
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Put the pond weed in the beaker,
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Fill the beaker with water.
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Move the light close to the pond weed,
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Count bubbles in one minute, / Measure oxygen produced
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Note down your results,
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Repeat experiment but move the light closer/further away from the pond weed each time.
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To make it a fair test, use same amount of water, use same length/volume of pond weed, time it for the same length.
Question 2 notes: The answer could be any experiment to test how the amount of light intensity affects photosynthesis. The question stated that you did not have to write about the equipment pictured and it was just an example.(6 marks)
3. Enzymes question
Circle Cytoplasm.
(1 mark)Rest of question is incomplete4. Plantains in the field
To improve their investigation: Use random sampling, take more samples.
With the mean average question, people seemed to be getting either 10,100 or 160,000. Different answers I know but we are not sure which is right.Rest of question is incomplete5. Polydactyly Question
Stem cells are undifferentiated stem cells that can potentially become any cell.
Rest of question is incompleteThis question had a lot of parts to do with alleles but it was so long no one can really remember it.6. Removing bacteria from milk with catalase.
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Advantages: Catalysts can be reused
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Disadvantages: Enzymes can denature, Hydrogen Peroxide doesn't kill all the bacteria
These weren't the only ones but they're the ones I have seen posted the most.Rest of question is incomplete7. Meiosis & Mitosis
The sperm cells were
produced in the testes by Meiosis. The embryo divided by Mitosis.
For the question about the size of each cell:Rest of question is incomplete8. Foxes
How can scientists prove the foxes originated from the same species?The scientists could breed 2 of the foxes and see if they produce fertile offspring. (Offspring which can reproduce)
How are the foxes different species?Foxes, Geographical isolation. Adapted differently. Mutation, So unable to breed. Different species.
Why were the foxes on the 3 islands varied but still the same species?The islands have similar conditions so the two species adapted similarly and were so similar they could still interbreed so were still of the same species.
I am not sure what question these answers were for)
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Muscular tissue contracts and churns food in the stomach
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Epithelial tissue covers the stomach
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Glandular tissue secretes hormones and enzymes
Note: The questions may not be in the right order.This is a mix of my answers and those of the community but they are not guaranteed to be correct.
Grade Boundary Predictions
These are completely my predictions, we have decided that it was a fairly
easy paper so our boundaries are fairly high.
A* - 46 marks
A - 37 marks
B - 31 marks
C - 24 marks
Thanks for using my mark scheme : )