iGCSE Edexcel Biology Paper 2B 2024

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fertilisers are used for plant growth but plant growth are beneficial for animal growth. so increased fertlisiers = more nitrates = more plant growth = animals have more to eat = more animal growth

Maybe but I thought it was relating to fish farming so surely they are fed protein pellets? Anyway idc, i'm sure we will pick up marks for all the eutrophication stuff.

Reply 41

sandyjones

Original post by si12345

I thought the gm fish absorbs more protein so less protein in their faeces so less ammonia made by decomposers, less nitrites so less nitrates

wait did it say in the question that gm fish absorb more protein?

Reply 42

si12345

Original post by sandyjones

wait did it say in the question that gm fish absorb more protein?

no but I think that was the answer to the question of why the gm fish are bigger despite being fed the same diet so you had to make some link there but idk

Reply 43

jdog1234

Original post by si12345

no but I think that was the answer to the question of why the gm fish are bigger despite being fed the same diet so you had to make some link there but idk

yh so more protein synthesis etc translation transcription

Reply 44

ua12345

Original post by jdog1234

yh so more protein synthesis etc translation transcription

talked about eutrophication and reliability for the 6 marker at the end - what did everyone else say

(edited 4 months ago)

Reply 45

si12345

Original post by jdog1234

yh so more protein synthesis etc translation transcription

Yea i think you could have also said more growth hormones - there were probs lots of possible mark points for that q.

Reply 46

jdog1234

Original post by si12345

Yea i think you could have also said more growth hormones - there were probs lots of possible mark points for that q.

no i doubt grwoth hormones thats not on the spec

Reply 47

alzi5

Original post by sandyjones

wait did it say in the question that gm fish absorb more protein?

feed conversion index was less for gm & they were fed protein pellets so yeah basically

Reply 48

sandyjones

Original post by alzi5

feed conversion index was less for gm & they were fed protein pellets so yeah basically

aah so there prob could be a lot of possible answers for the last one. didnt even think about faeces containing less protein just went straight to talk about eutrophication and bacteria dying.

Reply 49

sandyjones

Original post by si12345

no but I think that was the answer to the question of why the gm fish are bigger despite being fed the same diet so you had to make some link there but idk