A2 6BIO4 SNAB 11th Jan 2013: Let&#x27;s test each other

Original post by ItsDatGuy

Are the 09 papers from the old spec? cause if they are would there be any point in doing them?

It can't hurt to check them out but I had a quick look at the old specimen paper for 6I04? I believe and I could only attempt a small fraction of the questions that weren't based around the interpretation of data.

Does anyone know if specimen papers exist for this specification?

Reply 42

Reyoru

6BI04 Exam Paper SAMPLE.pdf224.4KB

Original post by Shakaa

It can't hurt to check them out but I had a quick look at the old specimen paper for 6I04? I believe and I could only attempt a small fraction of the questions that weren't based around the interpretation of data.

Does anyone know if specimen papers exist for this specification?

Here you go. :wink:

Reply 43

Original post by AmirHabeeb

Here you go. :wink:

Ah that's fantastic.

Also if anyone's interested I found some superb notes here

(edited 11 years ago)

Reply 44

ItsDatGuy

Original post by AmirHabeeb

Here you go. :wink:

Cheers, is their a mark scheme for that?

Reply 45

Reyoru

6BI04 Mark Scheme SAMPLE.pdf98.3KB

Original post by Shakaa

Ah that's fantastic.

Also if anyone's interested I found some superb notes here

Original post by ItsDatGuy

Cheers, is their a mark scheme for that?

Yup. Sorry forgot to upload. :redface:

Reply 46

OP

Original post by Shakaa

Ah that's fantastic.

Also if anyone's interested I found some superb notes here

Thank you for the notes!

Wanna revise?

Reply 47

C94

Original post by Shakaa

Ah that's fantastic.

Also if anyone's interested I found some superb notes here

Awesome notes dude

Reply 48

OP

What is the difference between GPP and NPP? (3marks)

Reply 49

OP

Why are there only 3-4 trophic levels? (3marks)

Reply 50

Original post by NilabKebab

What is the difference between GPP and NPP? (3marks)

GPP: The percentage of energy from the sun which is transferred into plant material

NPP: Percentage of the suns energy converted into plant Biomass

NPP=GPP-Respiration

Original post by NilabKebab

Why are there only 3-4 trophic levels? (3marks)

Increasing small amounts of energy has passed onto the next Trophic level therefore organisms at higher trophic levels often have to cover greater and greater distances to get enough food to supply their needs, as you reach the 4th-5th trophic level the energy required to travel great distances aswel as find mates becomes greater than the energy available and thus unsustainable.

Reply 51

OP

Original post by Shakaa

GPP: The percentage of energy from the sun which is transferred into plant material

NPP: Percentage of the suns energy converted into plant Biomass

NPP=GPP-Respiration

Increasing small amounts of energy has passed onto the next Trophic level therefore organisms at higher trophic levels often have to cover greater and greater distances to get enough food to supply their needs, as you reach the 4th-5th trophic level the energy required to travel great distances aswel as find mates becomes greater than the energy available and thus unsustainable.

Excellent answer for the first question. On the second question you could also mention:
-energy transfer is not efficient enough
-Not all energy available is eaten eg spikes/ roots, Energy is lost in faeces/bones and to surroundings by heat energy.
-Thus there are always less energy available at each trophic level- once it gets to 3/4th trophic level there just isn’t enough energy to continue the food chain.

Reply 52

Original post by NilabKebab

Excellent answer for the first question. On the second question you could also mention:
-energy transfer is not efficient enough
-Not all energy available is eaten eg spikes/ roots, Energy is lost in faeces/bones and to surroundings by heat energy.
-Thus there are always less energy available at each trophic level- once it gets to 3/4th trophic level there just isn’t enough energy to continue the food chain.

Ah it crossed my mind whilst putting it in, I blame lack of sleep :P

Reply 53

dineshn

He you guys being doing past papers? I have being doing poorly (losing nearly 30 marks) but still getting a* or high a according to the grade boundaries for BIOLOGY 4 in that year. Whats up? Are the grade boundaries different or something?

Reply 54

OP

Original post by dineshn

He you guys being doing past papers? I have being doing poorly (losing nearly 30 marks) but still getting a* or high a according to the grade boundaries for BIOLOGY 4 in that year. Whats up? Are the grade boundaries different or something?

The grade boundaries are low but its all to do with how students across the country do. If youre getting A*s its a good sign :smile:

Yh I dropped loads of marks on the jan 2011 paper lol :/

(edited 11 years ago)

Reply 55

OP

How do tubercles form? (3)

Reply 56

Don't want to jinx myself but Biology exams are "easy" in the sense all you have to do is put the time and effort in to learn the content there's very little in the way on concepts that you need to understand unlike physics or chemistry.

Reply 57

Reyoru

Original post by NilabKebab

How do tubercles form? (3)

We seriously don't need to know stuff like this

Reply 58

Hdizzle

9

Original post by Shakaa

Don't want to jinx myself but Biology exams are "easy" in the sense all you have to do is put the time and effort in to learn the content there's very little in the way on concepts that you need to understand unlike physics or chemistry.

find chemistry easier as its straight forward
bio = too much waffle

esp hate analysing graphs

Reply 59