For the candle question, it went out bc there was no oxygen and when they put the plant there it released oxygen through photosynthesis? Idk if that's right

Reply 10

Dxyesil

2

Yeah that’s what I put and the oxygen keeps the fire alight

Original post by kkai

For the candle question, it went out bc there was no oxygen and when they put the plant there it released oxygen through photosynthesis? Idk if that's right

Reply 11

Lauryyys

10

Yeah I put that and that the candle doesn't release any more carbon dioxide for the plant to photosynthesise further, hence only stayed alight for another 2 minutes

Original post by kkai

For the candle question, it went out bc there was no oxygen and when they put the plant there it released oxygen through photosynthesis? Idk if that's right

Reply 12

Cam3r0n

13

Original post by kkai

For the candle question, it went out bc there was no oxygen and when they put the plant there it released oxygen through photosynthesis? Idk if that's right

Yeah that's correct. Well done.

Reply 13

Cam3r0n

13

Original post by Lauryyys

Yeah I put that and that the candle doesn't release any more carbon dioxide for the plant to photosynthesise further, hence only stayed alight for another 2 minutes

The combustion of the candle does produce carbon dioxide, I think? If it does then it would stop because the combined intake of oxygen for respiration and combustion is at a higher rate than the production of oxygen in photosynthesis.

Reply 14

kate_howard_1

11

I’ve messed up the heart question! I got everything right except the names of the valves. I said the semi lunar valve when it was meant to be the triscupid if you get me. On both sides.. how many marks will I drop?

Reply 15

Anon1304

5

What question was that contraception one

Reply 16

Lauryyys

10

Yeah I still put the bit about oxygen and photosynthesis so

Original post by Cam3r0n

The combustion of the candle does produce carbon dioxide, I think? If it does then it would stop because the combined intake of oxygen for respiration and combustion is at a higher rate than the production of oxygen in photosynthesis.

Reply 17

kate_howard_1

11

Original post by Cam3r0n

Yeah that's correct. Well done.

What did you put for the controls of that experiment? I put size of candle wick and the size of the glass bell thing or whatever it was called

Reply 18

kate_howard_1

11

Original post by kkai

What everyone get for the population estimate question? I got 5000 something

Yeah like 5100

Reply 19

HE1234

6

Original post by kate_howard_1

I’ve messed up the heart question! I got everything right except the names of the valves. I said the semi lunar valve when it was meant to be the triscupid if you get me. On both sides.. how many marks will I drop?

It depends on what other information you put but if you put all the necessary info you’d probably only lose one mark.

Edexcel biology paper 2

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