Competition - post a photo you've taken of nature >>

2016 AQA Biology Unit 1 - Unofficial Mark scheme 2016

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6 marker:
A healthy diet consists of the right amount of different food groups such as:
- proteins for growth and repair of the cells.
- Fats stored as energy to keep the body warm.
- Water in order to function the body properly.
- Carbohydrates used as energy.
- Minerals and ions in order for the cells to function properly.
-Fibre used to aid digestion.

4 Marker about advantages and disadvantages of Gm Mosquitoes:
- Advantage is that it kills the offsprings so there is a decrease of numbers in mosquitoes. However, it is expensive if millions of mosquitoes and Genetically modified.
- Disadvantage female mosquitoes feed on blood and they are not killed therefore they are not affected. Malaria will still exist.

Indicating species: Lichens
Pollution
Invertebrates.

Reply 941

z_o_e

Original post by goldenusername

Tbh that paper was hard af, the grade boudaries should be like 19 for a C , 25 for a B, 32 for an A and 43 for an A* :redface:

Clear your inbox please

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Reply 942

goldenusername

Original post by z_o_e

Clear your inbox please

Posted from TSR Mobile

Done, sorry about that.

Reply 943

Zacl

The 6 marker - water because thats where all chemical reactions happen???

Reply 944

Cirsium

Original post by Mike-Lut

It asked for it as a percentage, so shouldn't you have multiplied by 100, to get 60%? That's what I put.

Then you've multiplied it by 100 twice...
2 / 3 is 66.7%
So 2 x 10^6 / 3 x 10^6 is 66.7%
And the question was 2 x 10^6 over 3 x 10^EIGHT - so it must be 100 times smaller.

Reply 945

Charlie2k

Original post by CallumMcleod

Not really connected, but does anyone have any idea what the grade boundaries might be for the exam? I know they change but any idea at all would be a good confidence boost / destroyer. haha

I reckon A* - 48, A - 39, B - 30, C - 21

Reply 946

goldenusername

Original post by Skywarrior657

Is invertebrates right fir the last method that was supposed to be different to your first??

Reply 947

katiewarriorx

What did everyone get in the last question? About the pollution indicator?

Reply 948

TappoWappoS

Does anyone know if I would get a mark for saying stonefly nymph as the pollution indicator??

Reply 949

username2574405

I know for the Gm Mosquito pro I put about it being only males so females die, can't reproduce so mosquitoes die out and can't affect as many people with malaria?
God knows how wrong that is.

Reply 950

Cirsium

Original post by Zacl

The 6 marker - water because thats where all chemical reactions happen???

Water not actually mentioned on the spec so hard to say. I wouldn't give you credit for it, but I'm a harsh marker

Reply 951

student.life

Hopefully B2 and B3 will be easier after today's terrible B1 paper. Kinda dreading C1 on Thursday though after seeing how bad today's paper was...

Reply 952

khatira

Original post by habeeb_00

I got 0.666 whoops for the malaria one

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I got that then x 100 to get a percentage
oh no..

Reply 953

emmaemmaem

I said
Mayfly Larvae to indicate dissolved oxygen
And then another way is if there is lots of rat tailed maggots,

Reply 954

Cirsium

Original post by TappoWappoS

Does anyone know if I would get a mark for saying stonefly nymph as the pollution indicator??

I would love that answer :smile:

Spec just says you have to know invertebrates, but I imagine they'll give credit for all the ones mentioned in their textbook so stonefly and mayfly and sludgeworm and stuff.