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AQA BIOL2~3rd June 2013~AS Biology (Now Closed)

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If you're losing motivation, watch Floyd Mayweather training! Hard work!
Sugarfree Redbull & water aha!
Good luck on Monday

I think most of our motivation is well and truly gone. :tongue:

Reply 1321

Satanel

Original post by Suzanna5678

Lucky I have psychology on Wednesday uhhhh! Can't wait to do normal things again

Oh god, I couldn't be doing with three exams in a row (especially since Biology and Chem unit 2 are so difficult!)

Normal things like sleep! :biggrin:

Reply 1322

BarryIsMyName

Has anyone else done the specimen paper for this? I'm just doing it now and some questions are ridiculous, for example in q 4 it talks about varieties of wheat (a and b), and says"suggest why there is an advàntages on growing variety b over a".the answers were about the stem and yield, which are not mentioned once in the question. ImageUploadedByStudent Room1370034946.769425.jpg

ImageUploadedByStudent Room1370034946.769425.jpg

ImageUploadedByStudent Room1370035000.480358.jpg

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Reply 1323

PR11NCE

Original post by Satanel

I think most of our motivation is well and truly gone. :tongue:

haha

Amen to that! But tomorrow is a new day, hopefully a good nights sleep will restore some!
Even worse thing is, the weather today was SO goddamn nice!!!!!!! ERGHHHHHH F EXAMS!

Reply 1324

PR11NCE

Original post by BarryIsMyName

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Dude, the specimen paper is crap!
I JUST finished this, I put that A is taller and A has a greater range of results. Marking relative to 2013 that should be fine if something similar were to come up on Monday, hopefully. I reiterate, the specimen paper is complete BS.

Reply 1325

Satanel

Original post by PR11NCE

haha

Amen to that! But tomorrow is a new day, hopefully a good nights sleep will restore some!
Even worse thing is, the weather today was SO goddamn nice!!!!!!! ERGHHHHHH F EXAMS!

Ugh, I KNOW; the weather is teasing us! Then when it comes Tuesday/Wednesday, the weather is going to suddenly take a turn for the worse.

EXPECT HURRICANES or something ridic. :tongue:

Reply 1326

maryamnc

Original post by BarryIsMyName

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I wouldn't worry about specimen's, they're really iffy for all papers and not representative at all. Think examiners make them just to scare us :wink:

Reply 1327

chelley2

Original post by Sum786

Approximately how many marks are you guys getting on the past papers? Also does anyone know the average mark for an A?
Thank you

I keep getting late 50s.got 65 on jan 13 after getting 48 on the mock a few weeks ago. For an A i think its normally between 60-65.I've seen 59 on one paper :smile:

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Reply 1328

PR11NCE

Original post by satanel

ugh, i know; the weather is teasing us! Then when it comes tuesday/wednesday, the weather is going to suddenly take a turn for the worse.

Expect hurricanes or something ridic. :tongue:

loooooooooool!!

Reply 1329

maryamnc

What do people think will be on this paper and what the 6 marker will be? My teacher said meiosis and gas exchange in fish are overdue

Reply 1330

Swords N Thorns

Can anyone suggest a 6 mark answer for gas exchange in insects or how water travels through the apoplastic/symplastic pathway? :smile:

I have a feeling one of these might come up.

Reply 1331

chelley2

Original post by Suzanna5678

Is it normal to just be fed up now

I'm on the verge of giving up ,just too tired :frown:

.Lets keep going guys .only a few days left :'(

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Reply 1332

BarryIsMyName

Original post by maryamnc

I wouldn't worry about specimen's, they're really iffy for all papers and not representative at all. Think examiners make them just to scare us :wink:

Ah okay thanks, the chemistry one was weird too, might have to create my own markscheme as I go along

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Reply 1333

PR11NCE

Original post by Swords N Thorns

Can anyone suggest a 6 mark answer for gas exchange in insects or how water travels through the apoplastic/symplastic pathway? :smile:

I have a feeling one of these might come up.

Air enters through open spiracles
Through trachea, down the concentration gradient
To respiring cells
o2 diffuses into respiring cells
Ventilation replaces air in trachea
Spiracles open and close by rhythmic abdominal movements

Apoplastic pathway - water movement through non living parts of cell, cell wall, allowing easy diffusion. When apoplast pathway gets to endodermis, casparian strip blocks it. Switches to symplast pathway. Through living parts of cell ie cytoplasm connected by plasmodesmata. Water then moves into xylem

Any good?

Reply 1334

Sum786

Original post by Suzanna5678

Lucky I have psychology on Wednesday uhhhh! Can't wait to do normal things again

ahhhhhhh same! How far have you got with psychology revision?

Reply 1335

Swords N Thorns

Original post by PR11NCE

Yes! Thank you! :biggrin:

Reply 1336

BarryIsMyName

Original post by Swords N Thorns

Can anyone suggest a 6 mark answer for gas exchange in insects or how water travels through the apoplastic/symplastic pathway? :smile:

I have a feeling one of these might come up.

For the water uptake in plants
- water enters via osmosis (high to low) in root hair cells
-due to mineral ions in cells
- mention of apoplastic an symplastic
-apoplastic around cell walls/gaps between cells
-symplastic through cytoplasm of cells (along water potential gradient)
-casparian strip which is waterproof in endodermis
- casparian strip helps control water uptake
-up the xylem
Just some ideas I'm not really an expert but probably what I'd put

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Reply 1337

chelley2

Original post by PR11NCE

Can you explain gas exchange in leaves please :smile:

I didn't get that in gcse ,i still don't get it in alevel -.-
Thankyou :smile:

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Reply 1338

Swords N Thorns

Does anyone know any key terms we need to know for this unit apart from interspecific and intraspecific variation? :tongue:

Reply 1339

PR11NCE

Original post by chelley2

Can you explain gas exchange in leaves please :smile:

I didn't get that in gcse ,i still don't get it in alevel -.-
Thankyou :smile:

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Try this

Stomata open
CO2 diffuses into mesophyll cells (have large SA)
Down its concentration gradient
O2 released as waste product of photosynthesis
O2 required for respiration, energy produced for active transport or whatever
Guard cells control opening and closing of stomatal pores

I'm sorry if this is rubbish, i am NO good at anything plant related.