What was the right amswer

Was it not just in step 2 when it was saying you have to digest the gene from the mammoth or something like that. The word should have been exracted rather than digested?

Thats what i was thinking anyway like since when do they get digested please...

Reply 3946

Arual98

1

Original post by lucyjane111

it was social behaviour for the chimp one wasnt it? because it specifically asked in terms of chimps not the little monkeys, it also made a point of saying chimps hunt in groups

That's what I thought, I put social too but a lot of people are saying insight, but they aren't actually using tools or the surroundings so idk?

Reply 3947

f215_exam

1

something to do with preventing contamination in the culture and slowing the growth of the explant into a callus

Reply 3948

lucyjane111

1

Original post by Arual98

That's what I thought, I put social too but a lot of people are saying insight, but they aren't actually using tools or the surroundings so idk?

yeah wouldnt have been insight, think people are just over complicating it

Reply 3949

Missemilynorman

1

I said that instead of 'digesting' the DNA, the enzyme 'hydrolysed' the sugar phosphate backbone

Reply 3950

AnnekaChan173

18

Original post by Ula456

the last stage (cant remember which animal)
hawk and something?..
Cause its the highest trophic level in the food chain and energy will have been lost along the food chain due to excretion e.t.c

Efficient. So disregard the actual numbers. I think I put the first stage, things like cellulose can't be digested by many organisms, and they use a lot of energy in respiration etc, so less is converted to biomass. At high levels transfer -has- to be efficient because there's so little energy.

Reply 3951

username2097061

2

Original post by AnnekaChan173

We are so getting Jan 13 grade boundaries

Most of Jan 13 was filling in spaces and ticking boxes!!

Reply 3952

islay123

Original post by AnnekaChan173

Efficient. So disregard the actual numbers. I think I put the first stage, things like cellulose can't be digested by many organisms, and they use a lot of energy in respiration etc, so less is converted to biomass. At high levels transfer -has- to be efficient because there's so little energy.

did it not ask about which is the most ineffecient transfer of energy?? therefore it was the last one from the second last one as it has travelled the most thereforelots has been wasted in the process?

(edited 7 years ago)

Reply 3953

Wheater

1

Original post by islay123

did it not ask about which is the most ineffecient transfer of energy?? therefore it was the last one from the second last one as it has travelled the most there lots has been wasted in the process?

It was the first stage, as efficiency INCREASES up a food chain- we are taught that its inefficient, which is true, energy is still lost, but the % of biomass that is digested increases.

UNOFFICAL MARKSCHEME attached !!!! ImageUploadedByStudent Room1466699515.049298.jpg

ImageUploadedByStudent Room1466699540.642822.jpg

ImageUploadedByStudent Room1466699558.275473.jpg

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(questions may not be in correct order and answers are overall opinion and my opinion from reading answers don't tell me to go do BTEC hair and beauty please )

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(edited 7 years ago)

Reply 3956

Hollyht

10

Original post by Anymorefor123

Aaran please may you make an unofficial markscheme ! You answers are always right . Please I'd really appreciate that :smile:

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I made one check the latest page

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Reply 3957

AnnekaChan173

18

Original post by islay123

did it not ask about which is the most ineffecient transfer of energy?? therefore it was the last one from the second last one as it has travelled the most thereforelots has been wasted in the process?

Yeah, the first step is the most inefficient. As you go up the food chain, less energy is available, so energy transfer has to become more efficient. Primary consumers respire, move, use energy to stay warm and cannot break down some of the biomass of plants (cellulose), so not much of this energy is converted to biomass, making this step v inefficient. there was a question in a past paper where the herbivores converted a lower percentage of energy to biomass than carnivores did too.

Reply 3958

AnnekaChan173

18

Original post by Hollyht

UNOFFICAL MARKSCHEME attached !!!! ImageUploadedByStudent Room1466699515.049298.jpg

(questions may not be in correct order and answers are overall opinion and my opinion from reading answers don't tell me to go do BTEC hair and beauty please )

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10.5 was the rounded answer for chi squared no?