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

Wjec As Biology By2! - 8th June

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Reply 60

Zebra-Zahra

otibarns

no it was actually mitochondria. active transport of potassium ions requires atp from mitochondria. malate theory

I think you may both be thinking of different questions (or maybe I am...) :p:

Wikipedia, if you trust it, says "The guard cells contain chloroplasts, so they can manufacture food by photosynthesis (The epidermal cells do not contain chloroplasts)"

I put mitochondria though, so that's a mark down the drain for me :frown:

Reply 61

SmartFool

People i spoke to said it was either really hard, or really easy! i really want the boundaries to be low!!

Reply 62

otibarns

Zebra-Zahra

I think you may both be thinking of different questions (or maybe I am...) :p:

ah well.
what did everyone have for the one when it asked what mode of nutrition for each animals. i first put holozoic feeder for both of them but changed to herbivore carnivore

Reply 63

doctormoley

i put herbivore - horny pad for grinding food
carnivore - canine teeth for ripping and biting food. :s-smilie:

not 100% on that though :smile:

Reply 64

SmartFool

otibarns

ah well.
what did everyone have for the one when it asked what mode of nutrition for each animals. i first put holozoic feeder for both of them but changed to herbivore carnivore

i put herbivore and carnivore too but im sure it said "types" of nutrition so it could have been holozoic and mutualism.

Reply 65

otibarns

no it said mode. stupid question really. i had diastema for herbivore and carnassial teeth for carnivore

Reply 66

SmartFool

anyone know the grade boundaries for the last couple of papers, could use that to guess what these grade boundaries might be??

Reply 67

otibarns

they put it out of 120. an A was 95 for BY1 B was 80ish I think. not sure about the rest

Reply 68

doctormoley

i can't find them anywhere, but don't WJEC do weird MIS marks or something? :s-smilie:

Reply 69

CJ89

BI2 June 2009
Max Mark 70
Mean Mark 36.9
Grade Ranges:-
A 51
B 45
C 40
D 35
E 30

BI2 January 2010
Max Mark 70
Mean Mark 31.0
Grade Ranges:-
A 46
B 41
C 36
D 31
E 27

Reply 70

doctormoley

Jan 2010 grade boundaries look pretty low. that mean high boundaries for this one? :s-smilie:

Reply 71

SmartFool

CJ89

BI2 June 2009
Max Mark 70
Mean Mark 36.9
Grade Ranges:-
A 51
B 45
C 40
D 35
E 30

BI2 January 2010
Max Mark 70
Mean Mark 31.0
Grade Ranges:-
A 46
B 41
C 36
D 31
E 27

it sure does look promising! hopefully they wont go above anymore than 52/53 range

Reply 72

otibarns

BI2 is different specs though surely ?

Reply 73

Zebra-Zahra

Did we have to write 'herbivorous' and 'carnivorous', or would 'herbivore' and 'carnivore' be ok? :s-smilie:

My teacher seems to think we had to write the former, but hopefully the latter will be alright? Maybe?

Reply 74

SmartFool

doctormoley

Jan 2010 grade boundaries look pretty low. that mean high boundaries for this one? :s-smilie:

hopefully not it was an ok/easy paper for most, so more people are likely to make mistakes, so the grade boundaries shouldn't increase by that much, plus the essay questions were on the same topic, there most be quite a few people out there whose weak topic was plants and couldn't answer it that well, bringing it down! fingers crossed!

Reply 75

otibarns

Zebra-Zahra

Did we have to write 'herbivorous' and 'carnivorous', or would 'herbivore' and 'carnivore' be ok? :s-smilie:

My teacher seems to think we had to write the former, but hopefully the latter will be alright? Maybe?

I wrote herbivorous and carnivorous to be sure

Reply 76

Zebra-Zahra

SmartFool

Most of my year group, seeing as we only covered plants in the last few lessons before study leave! Apparently, "you only need to know the basics really".... yeah :p:

Reply 77

otibarns

what did everyone get for the stomatal opening and how light effects it ?
I said about the malate theory

Reply 78

sarp

I LOVED IT <3
if I get less than a B, I will cry lol. Although it took me 15 minutes to think of the word 'homologous' because all i had in my mind was Hydrophytes from the first question hahaa.

I did the leaf one for the essay question, 'cause i did a practice one like that last week (same question is a paper a few years ago) but don't think I got everything 'cause I didn't look over the structure of the leaf yesterday :/

Was gutted there was no heart stuff though. I spent a good few hours learning it all at the weekend :| Grrr. I even understand it now haha