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My school used maths in focus for 3u and I found it to be quite useful (mainly for explanations and examples, rather than lots of difficult questions), although for year 12 you should consider more rigorous textbooks such as new senior maths or Cambridge. They have far more challenging questions...

97-98

90-92

Technically, this did not prove that cathode rays had mass, although we now know this. The paddlewheel turns due to the radiometric effect, also demonstrated by the Crooke's Radiometer.

I suppose B and C are both innate, although the question specifies innate response, so surely phagocytes is correct because stomach acid isn't produced in response to a pathogen?

I'm not sure about their answer for q5

Not useful in terms of simulating the type of questions we could've expected

Hard to say for sure, but what else could the three marks be for? (1) - Identify an adaptation (1) - Example? or maybe a reason why plants need to maintain water? (1) - Describe how it assists in maintaining water Look, I wouldn't be hopeful for 3 marks if you didn't have an example, but you...

It didn't directly ask for a specific plant in the question, but I think it's a good idea to use an example for a 3 mark describe question.

What did everyone do for the 3 marker on an example of a mechanism of xerophytic adaptation? I wrote about CAM metabolism because it was the only one I could think of that is actually a mechanism rather than a structural adaptation. But I’m starting to think that the question wanted you to...

It’s now on the NESA website I assumed that “DNA base sequence is used to code for a sequence of four amino acids” to mean the mRNA gets transcribed from that particular strand (so it is complementary to the given DNA except with uracil) and then the tRNA anticodons are complementary to the...

My reasoning for D is that the detection of the fetus acts as the stimulus, which causes oxytocin to be released, which then causes the stimulus and thus another iteration of the loop. If oxytocin results in more oxytocin were true it would really be a feedback loop.

She must've applied for misadventure. A friend of mine had an appendectomy in the HSC period so he couldn't do the SDD exam and he ended up getting some sort of estimated mark. But under what conditions could she have even applied for misadventure if she was able to attend school the same day?

Is it possible that someone can not sit an HSC exam and be hardly impacted? A girl in my year didn't sit the bio exam on Monday (as my engo friends noticed her in maths) and she is ranked quite highly (~10/110 at a rank ~30 school). What happens in this situation? I've heard of people doing...

I was awarded a mark in prelim for writing 180/30=9

I had: D C D D B C A B A C B D B B C D A D A B Might not all be right but I’m confident for at least 18

My careers advisor said 6 months after you leave school, for government schools, that is.

Definitely environmental pressure

I think it was 2 for naming the alleles inherited from the parents and 4 for the chromosomes

Was anyone else surprised that they put this question in the test? Considering that it was in the sample questions provided by NESA.