HSC 2017 Predictions/Preparation Thread [Biology] (1 Viewer)

[pikachu975]

That's already been answer way too many times. I was hoping more on explaining the function and structure.

Ah yes explaining the function of each part would be great too

Not sure how we would comment on structure!!

 

[Mathew587]

Ah yes explaining the function of each part would be great too

Not sure how we would comment on structure!!

tbh i'd have thought more of the actual nerves and its components

 

[captainhelium]

Bit of a dumb question but speaking of nerves, do they only contain bundles of axons or do they have dendrites as well?

I've legit seen various sources say different things so I'm so confused lol. Wikipedia and some textbooks for example only states axon but then my bio teacher said it contains dendrites as well.

 

[BLIT2014]

Bit of a dumb question but speaking of nerves, do they only contain bundles of axons or do they have dendrites as well?

I've legit seen various sources say different things so I'm so confused lol. Wikipedia and some textbooks for example only states axon but then my bio teacher said it contains dendrites as well.

Could your biology teacher been talking about a neuron?

See: https://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2011exams/pdf_doc/2011-hsc-exam-biology.pdf 32A (Communications)

and the sample answer given https://www.boardofstudies.nsw.edu....ams/pdf_doc/biology-hsc-sample-answers-11.pdf

 

[same1111]

Bit of a dumb question but speaking of nerves, do they only contain bundles of axons or do they have dendrites as well?

I've legit seen various sources say different things so I'm so confused lol. Wikipedia and some textbooks for example only states axon but then my bio teacher said it contains dendrites as well.

I know them to be a bundle of fibres so i suppose they could have both.

 

[pikachu975]

Bit of a dumb question but speaking of nerves, do they only contain bundles of axons or do they have dendrites as well?

I've legit seen various sources say different things so I'm so confused lol. Wikipedia and some textbooks for example only states axon but then my bio teacher said it contains dendrites as well.

Hmm I don't think you gotta know nerve structure other than it's a bundle of neurons / bundle of axons. I guess naturally you could say they do have dendrites because the bundles of neurons have dendrites.

 

[A E S T H E T I C]

For biotech I'm hoping and praying the 7-marker will be on ethics because it's the easiest part of the whole option.
Last time they did it was 2014 so... perhaps?

 

[sourish]

, could someone please provide me with a response for the question in the picture, have a feeling that a similar question will be in the test

 

[BlueGas]

View attachment 34287, could someone please provide me with a response for the question in the picture, have a feeling that a similar question will be in the test

1. Simply search up the difference between a motor neuron and a sensory neuron
2. Why do we need micrographs to view neurons? Size, structure, etc.
3. In a nutshell, a minimum threshold needs to be met in order to generate an action potential

 

[ShootingDuck]

Discuss some ethical considerations arising from the development of genetically modified animals. (4)

How would you go about answering this question? When it says "ethical considerations" is it only the negative points it's asking for, or is it both positive and negative since it says "discuss"

 

[r3]

Discuss some ethical considerations arising from the development of genetically modified animals. (4)

How would you go about answering this question? When it says "ethical considerations" is it only the negative points it's asking for, or is it both positive and negative since it says "discuss"

The question asks you to discuss - meaning to consider both benefits and limitations to GM animals. As for answering this question, I'd set it out like this:

Point 1 - Define what a GM animal is. Ideally, you should also outline transgenesis + give an example (Bt cotton, transgenic salmon etc)
Point 2 - Outline at least 2 advantages to producing such organisms, eg. increased productivity and thus profit for farmers + improved quality of food
Point 3 - Talk about at least 2 negatives to GM animals, eg. decreased genetic diversity + shortened life expectancy

could you also please post the criteria if you have it? thanks

Hope this helped!

 

[ShootingDuck]

The question asks you to discuss - meaning to consider both benefits and limitations to GM animals. As for answering this question, I'd set it out like this:

Point 1 - Define what a GM animal is. Ideally, you should also outline transgenesis + give an example (Bt cotton, transgenic salmon etc)
Point 2 - Outline at least 2 advantages to producing such organisms, eg. increased productivity and thus profit for farmers + improved quality of food
Point 3 - Talk about at least 2 negatives to GM animals, eg. decreased genetic diversity + shortened life expectancy

could you also please post the criteria if you have it? thanks

Hope this helped!

Yes that did help, thank you for clarifying. Stupid me only just realised that the older past papers do have marking guidelines rip.

Here it is for that particular question:
• Identification of at least two relevant ethical issues associated with
genetically modifying animals
• Provides an argument for and/or against genetically modifying animals

 

[A E S T H E T I C]

The question asks you to discuss - meaning to consider both benefits and limitations to GM animals. As for answering this question, I'd set it out like this:

Point 1 - Define what a GM animal is. Ideally, you should also outline transgenesis + give an example (Bt cotton, transgenic salmon etc)
Point 2 - Outline at least 2 advantages to producing such organisms, eg. increased productivity and thus profit for farmers + improved quality of food
Point 3 - Talk about at least 2 negatives to GM animals, eg. decreased genetic diversity + shortened life expectancy

See, I'd personally be hesitant to name productivity as an ethical concern.
My ethical positives would probably be something like "reduced need to use environmentally unfriendly pesticides" and "GM crops can be modified for growth in regions with poor soil quality, providing better access to food for all"
And my negatives would be like something about terminator genes and big agriscience companies controlling seed crops, and something about the possibility for animal genes to be placed into plants and the implications of that for vegetarians/muslims/hindus etc.

 

[ShootingDuck]

See, I'd personally be hesitant to name productivity as an ethical concern.
My ethical positives would probably be something like "reduced need to use environmentally unfriendly pesticides" and "GM crops can be modified for growth in regions with poor soil quality, providing better access to food for all"
And my negatives would be like something about terminator genes and big agriscience companies controlling seed crops, and something about the possibility for animal genes to be placed into plants and the implications of that for vegetarians/muslims/hindus etc.

Those seem like valid points; the only issue is the question that I posted asked about genetically modified animals, not plants.

 

[r3]

See, I'd personally be hesitant to name productivity as an ethical concern.
My ethical positives would probably be something like "reduced need to use environmentally unfriendly pesticides" and "GM crops can be modified for growth in regions with poor soil quality, providing better access to food for all"
And my negatives would be like something about terminator genes and big agriscience companies controlling seed crops, and something about the possibility for animal genes to be placed into plants and the implications of that for vegetarians/muslims/hindus etc.

Yeah I agree with you about my positive ethical considerations, ty for pointing that out. Also I haven't heard of terminator genes, could you please explain what they are?

Those seem like valid points; the only issue is the question that I posted asked about genetically modified animals, not plants.

You could simply tweak these points to suit the question. Eg. instead of GM crops being grown in poor soils, GM animals such as cattle can be made to tolerate harsh conditions.

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[sourish]

Bro you got so lucky this HSC

 

[ShootingDuck]

Bro you got so lucky this HSC

Who did sorry? And why?

 

[lookinforacookin]

Wow, you guys predicted they would ask about Beadle and Tatum and it was the 8 marker!! lucky I studied it after coming on here haha

 

[ShootingDuck]

Oh I'm stupid I guess that's what Sourish meant. Yeah we're definitely lucky.

 

[pikachu975]

Well there are answers up from NESA now on their site