OCR B7 Unofficial Mark Scheme - Monday 19th June 2017

did this question specifically ask to state the most sustainable method? because i just said "unsustainable timber harvesting removes food sources and habitats for organisms, method C is the least sustainable because as the cycle goes on the amount of teak produced rises dramatically which means more trees are cut down so there are less for future generations" how many marks does anyone think ill get for this?

As long as Method C was the highest line, then you should get most of the marks.
So, just to confirm, higher on the graph, meant less sustainable?

I said C was most sustainable bc I didn't get the graph so not sure but if you've talked about effects of the timber harvesting u should get 3 regardless - hopefully

The Y axis was M^3/ha so surely less is better?

As long as Method C was the highest line, then you should get most of the marks.
So, just to confirm, higher on the graph, meant less sustainable?

Does anyone have access to a copy of the paper which they can post online? I really want to see that last question again - whether or not the two uses were specifically supposed to be foods (I put bio detergents and biofuels, but I even thought about fungal chymosin and single-cell proteins at the time as well; it would be SO frustrating to have lost 2 marks like this - that could be a difference of about 7 UMS marks!).

I said C was most sustainable bc I didn't get the graph so not sure but if you've talked about effects of the timber harvesting u should get 3 regardless - hopefully

All questions are below:
Total /60

Label the other muscle (1 mark)
Correct label (1)

Draw on the tendon (1 mark)
Drawing on a tendon connecting bone to muscle (1)

Explain how they produce movement (2 marks)
One contracts whilst the other relaxes (1)
Tendons transmit forces between muscles and bones (1)
They can only move by pulling (1)

Match up structures of joint (3 marks)

Image above

Components of blood (6 marks)
Platelets – clot blood at site of injury
WBC – fight infections, and produce antibodies.
RBC – packed with haemoglobin to carry oxygen to cells for respiration
Plasma – carries substances eg glucose, oxygen, hormones and antibodies into cells and carbon dioxide and urea out.

Tissue fluid (3 marks)
High pressure = left (1)
Low pressure = right (1)
Tissue fluid = a line going up from the capillary into the bed (1)

Reading from the graph (1 mark)
110 and 100 (1)

Percentage increase (1 mark)
52-55% (1)

Tick boxes about whether trend is shown/not (2 marks)
Yes
No
No
No (2)

Why he goes redder (2 marks)
His blood vessels will be vasodilating (1)
Allowing more blood to flow closer to the skin (1)

Extra data Jon could collect (2 marks)
Repeat (1)
With a large sample size (1)
With a variety of ages (1)

Diabetics and what they can learn from the graph (6 marks)
Low GI should be used because it releases energy over a longer period of time, so there isn’t a surge in the glucose level.
Identifying foods from each category which were 55 or under.

Timber harvesting (6 marks)
Effect – soil erosion, increased carbon dioxide levels, loss of habitats, reduction in biodiversity.
Sustainability – not sure which was the most/least sustainable.

Definition of GM (1 mark)
James (1)

Advantages/Disadvantages of GM (3 marks)
Seed producer
Farmer
Disadvantage
Seed
Farmer
Disadvantage

Why is the UK not using GM crops? (2 marks)
Our perceived risk is higher (1)
People in North and South America may think that the benefits outweigh the risks (1)
Possible health risks so in the UK we are against it (1)

Why is it good that the container changes colour? (2 marks)
Can tell when there are holes in the packaging (1)
So they can make it airtight to prevent bacteria getting in (1)

Tick box about nanotechnology (1 mark)
Some molecules (1)

Uses of fermentation (2 mark)
Alcohol (1)
Medicines (1)

Tick boxes about data from table about fertilisers (2 marks) – UNCONFIRMED
Box 3 (1)
Box 4 (1)

Explain why nitrogen cycle isn’t closed loop (2 marks)
Leaves get blown away by the wind (1)
Not all of the rabbit will decay (1)
Animals may migrate (1)
Nitrates may be removed by wind or water (1)

Is the student correct? (3 marks)
Calculation of how many tonnes for Spain (2)
Therefore, he is correct (1)

Why is inorganic fertilisers useful? (2 marks)
Improves crop yield (1)
So more money for the farmer (1)
So more work for the local community (1)
So more money for the local economy (1)

Order of eutrophication (1 mark)
DCAEB (1) UNCONFIRMED

Why crude oil isn't closed loop (2 marks)
It takes millions of years to form (1)
from tiny dead sea creatures (1)
It is used quicker than it is replaced (1)

Sustainable energy source (1 mark)
Sunlight (1)

Predicted A* Boundary: 47

hiya uh does anyone have the answer for the match up structures of a joint? It says the attachment can't be found, thankyouuuuuu

x
-
For first column

Second column
1st to 3rd
2nd to 2nd
3rs to 1st

Thankyou thankyou!!!

Hope it makes sense