VCE Biology Exam Discussion and Solutions

[PhoenixxFire]

Thanks for explaining, but what information in the stem suggests that childhood infection helps protect against MS?

It says that of those with MS 30% less had the childhood infection than those without MS.

[ardria]

Why is 36 not A?

I was debating whether it was A or B and decided A as it was debatable whether what was listed would be considered "highly developed". Also because a larger brain is needed to be capable of speech (which is needed to have burial rites, as a previous VCAA exam directly suggested) and to make complex tools.

[chrisjudd00]

Whats a good multi score out of 40 like 34-35+?

[Pandable]

Why is 36 not A?

I was debating whether it was A or B and decided A as it was debatable whether what was listed would be considered "highly developed". Also because a larger brain is needed to be capable of speech (which is needed to have burial rites, as a previous VCAA exam directly suggested) and to make complex tools.

I will tell you this, (its not something biologist admit) but Neaderthals had larger brains then us, we just had more of our brain allocated to complex thinking rather then memory storage

[waterangel82]

Hi Vox,

Thank you for the answers. I'm pretty happy with getting 39/40 for MC, but I don't really understand question 8 for the pH meter, because aren't instruments calibrated to ensure better precision. But then again, I did search up pH meter calibration, and it said that it was calibrated to ensure accurate results. Is it alright if you could explain to me?  Thanks!

[LifeisaConstantStruggle]

38/40 that's kinda at least it's over though I secretly hope that I ace most of the SAQs

[PhoenixxFire]

FML. I picked A instead of B for Q40 (even though i thought it didn't make sense) because i read in the stem it said the RNA was degraded and i was like b will silence it not degrade it. Somehow i missed the few words before that where it said the gene was silenced.

[PhoenixxFire]

J41 added section B!

[James Holgate]

I will tell you this, (its not something biologist admit) but Neaderthals had larger brains then us, we just had more of our brain allocated to complex thinking rather then memory storage

For neanderthal question I chose they had evidence of culture...?

[ardria]

Hi Vox,

Thank you for the answers. I'm pretty happy with getting 39/40 for MC, but I don't really understand question 8 for the pH meter, because aren't instruments calibrated to ensure better precision. But then again, I did search up pH meter calibration, and it said that it was calibrated to ensure accurate results. Is it alright if you could explain to me?  Thanks!

That has to do with the definitions of precision and accuracy.

Precision: e.g. if you repeat a measurement, the machine will produce the same measurement each time. This measurement could be wrong (inaccurate), but the machine is precise.

Accuracy: whether the measurement is factually corrected or not. E.g. if a student is conducting a test for the optimum pH of human body enzymes and the results suggested it was 25 degrees, this would be inaccurate as it goes against fact.

[Pandable]

For neanderthal question I chose they had evidence of culture...?

Sorry i was not clear enough yes the answer is that they had evidence of culture

[Joseph41]

A copy of Section B now uploaded.

https://atarnotes.com/forum/index.php?topic=174920.msg1000351#msg1000351

[ardria]

For neanderthal question I chose they had evidence of culture...?

I'm not really sure what Pandable is trying to say because I said I chose the answer about bigger brains haha, because both culture and complex tool making needs a developed brain.

I didn't choose the "highly developed culture" answer because it didn't seem like you could confirm that it was "highly developed".

I'm trying to understand why it would definitely be B but I don't get why A is wrong 

[vazi]

Could 37 be B since it says yellow virus fever is transmitted by mosquitoes?

[PhoenixxFire]

I'm not really sure what Pandable is trying to say because I said I chose the answer about bigger brains haha, because both culture and complex tool making needs a developed brain.

I didn't choose the "highly developed culture" answer because it didn't seem like you could confirm that it was "highly developed".

All the things listed in the stem indicate a highly developed culture.