HSC Biology Question Thread

[Blissfulmelodii]

I think it may be but since this is biology I'm not sure if that relates to anything in the biology syllabus.

Ahh that's true, I did that in year 10.

I did find this website that has some pretty cool Ideas (and they are bio related)

https://askabiologist.asu.edu/activities/experiments

[Skidous]

I think it may be but since this is biology I'm not sure if that relates to anything in the biology syllabus.
[/quote

Ahh that's true, I did that in year 10.

Yeah most SRP are done in year 10 so I'm not sure whether or not there is an experiment you can do as an SRP for bio cause most of my ideas use plants

[jamesq]

The SRP is the same as the one in yr10 but in this case it has to be biology related It can be anything just as long as it relates to biology

[Skidous]

The SRP is the same as the one in yr10 but in this case it has to be biology related It can be anything just as long as it relates to biology

You may want to look at the syllabus and on the 3rd column there will be a bunch of practical tasks (look for first hand) and use one of those

[anotherworld2b]

Hi,
I wanted to ask is there a way that enables someone to easily identify a tissue?
Does anyone have any tips?
I have seen a few questions that requires me to identify the tissue and explain why I think so. However, I am quite bad at answering this type of question

[Blissfulmelodii]

Hi,
I wanted to ask is there a way that enables someone to easily identify a tissue?
Does anyone have any tips?
I have seen a few questions that requires me to identify the tissue and explain why I think so. However, I am quite bad at answering this type of question

I found this video on YouTube that I think explains it all pretty well and answers your question

https://www.youtube.com/watch?v=NDWYZdow87I

[vox nihili]

Hi,
I wanted to ask is there a way that enables someone to easily identify a tissue?
Does anyone have any tips?
I have seen a few questions that requires me to identify the tissue and explain why I think so. However, I am quite bad at answering this type of question

Not entirely sure what kind of stuff you need to be able to do, but I learn most of my histology by having a play around with some tissue slices.

This is a really good database for them: https://www.best.edu.au/s/featured

[J.B]

Hi I am studying the Blueprint of Life topic at the moment.
I was just wondering in relation to the dot point "explain how mutations in DNA may lead to the generation of new alleles."
I am just a bit confused. Is it just because mutations change the DNA base sequence which changes the gene. And since alleles are genes they are therefore different? How would this work in relation to the dominant and recessive alleles?
Thank you

[Skidous]

Hi I am studying the Blueprint of Life topic at the moment.
I was just wondering in relation to the dot point "explain how mutations in DNA may lead to the generation of new alleles."
I am just a bit confused. Is it just because mutations change the DNA base sequence which changes the gene. And since alleles are genes they are therefore different? How would this work in relation to the dominant and recessive alleles?
Thank you

That's sorta right. Since mutations changes the structure of the DNA, it changes how that part of the DNA (the gene) is experessed and thus changing something about the organism (either physiologically or physically). These changes aren't always beneficial and could be very detrimental if not lethal.

As for dominant and recessive traits that will depend upon how the mutated gene is experessed in further generations (if asked a question on dominant/recessive traits you will more than likely be given a pedigree to draw or fill in)

Hope this Helps

[katnisschung]

Question,
why are freshwater fish considered hypertonic to their surroundings?
my textbook says this and I am having trouble understanding

[Skidous]

Question,
why are freshwater fish considered hypertonic to their surroundings?
my textbook says this and I am having trouble understanding

Hey Kat

Freshwater fish contain a larger concentration of solute (salts) compared to the surrounding water, therefore water will enter the fish's body through osmosis to balance the concentrations, hence the fish is considered hypertonic (more salt)

[katnisschung]

hmmm.. could u please explain the difference between hypertonic and
hypotonic pls

[Rathin]

hmmm.. could u please explain the difference between hypertonic and
hypotonic pls

A hypotonic solution is one in which the concentration of solutes is greater inside the cell than outside of it, and a hypertonic solution is one where the concentration of solutes is greater outside the cell than inside it. Isotonic solution is when the concentration outside and inside are in an equilibrium. 

[vcestressed]

This video is super helpful btw:
https://www.khanacademy.org/science/biology/membranes-and-transport/diffusion-and-osmosis/v/hypotonic-isotonic-and-hypertonic-solutions-tonicity
 

[shreya_ajoshi]

Hello!
Anyone have any links to videos that cover the Biology Syllabus?
Thank you