swag_sxc_boi's Bio 3/4 question thread

[swagsxcboi]

Antigen: Any molecule that initiates an immune response

Is this correct or is it useful to add 'specific immune response'

[simpak]

Would it be useful?

Probably!

I'm just going to say, and this isn't meant to be rude - a lot of you guys ask questions being like 'is it necessary for me to know [insert something I clearly already know]' or 'is it necessary for me to add this specific word into my definition?'.
If you want to cover all of your bases, always be more specific, cover more ground, be more particular in the way you're referring to things.
If you think you might need to know something, and you already know it, then don't ask if you need to know it because you evidently already have it down-pat!

Okay that rant over, yes, it's useful to add the word specific.

[Yacoubb]

Would it be useful?

Probably!

I'm just going to say, and this isn't meant to be rude - a lot of you guys ask questions being like 'is it necessary for me to know [insert something I clearly already know]' or 'is it necessary for me to add this specific word into my definition?'.
If you want to cover all of your bases, always be more specific, cover more ground, be more particular in the way you're referring to things.
If you think you might need to know something, and you already know it, then don't ask if you need to know it because you evidently already have it down-pat!

Okay that rant over, yes, it's useful to add the word specific.

A lot of what we mention is just to clarify whether our understanding isn't flawwed, but also for checking our expression. I don't get why we can't just check to ensure whether our expression is suitable. Assessors are extremely pedantic, and from my POV, asking for our expression to be checked over isn't such a bad thing.

[swagsxcboi]

Would it be useful?

Probably!

I'm just going to say, and this isn't meant to be rude - a lot of you guys ask questions being like 'is it necessary for me to know [insert something I clearly already know]' or 'is it necessary for me to add this specific word into my definition?'.
If you want to cover all of your bases, always be more specific, cover more ground, be more particular in the way you're referring to things.
If you think you might need to know something, and you already know it, then don't ask if you need to know it because you evidently already have it down-pat!

Okay that rant over, yes, it's useful to add the word specific.

I see what you mean, thanks simpak!

What Yaccoub said I feel is also relevant
for example, I lost marks on a SAC for saying 'along the concentration gradient' instead of 'down the concentration gradient'
so I guess it's useful to clarify definitions so I could explain using relevant key words and not lose easy marks

[simpak]

A lot of what we mention is just to clarify whether our understanding isn't flawwed, but also for checking our expression. I don't get why we can't just check to ensure whether our expression is suitable. Assessors are extremely pedantic, and from my POV, asking for our expression to be checked over isn't such a bad thing.

That's fine, but as a rule, it is always better to give more DETAIL as long as it's a relevant detail.  If you're concerned a definition isn't specific enough then specify just in case.

Re: expression, I understand what you're saying, but that's not always how the questions are phrased.
In fact, sometimes when I've seen people asking 'do I need to know...' rather than 'is this correct?' or 'is this how you would answer...' I skim over what they say without looking at their expression for key words.  So then I'm really not addressing the question properly and it could be problematic!  If you phrase your question differently I have no issue checking over your expression.

[swagsxcboi]

how do you approach experimental design questions? as in designing an experiment

[Yacoubb]

how do you approach experimental design questions? as in designing an experiment

* Large sample of organisms. Make sure that they are of relatively the same age, size, height, health.
* Divide the organisms into your experimental group/s and your control group.
* Show what will be different between the experimental and control group. E.g. 50 of the 100 mice with HD will be given the ___ drug (experimental group), while the other 50 mice with HD will be given a placebo (control group).
* Indicate that you will control variables between the groups (including space, temperature, light, food, water, etc). Nominate that you'll be doing this.
* Indicate the time frame and integrate what results would support the hypothesis; make a comparison. For instance: The hypothesis would be supported if the mice administered the drug had a greater survival rate and more enhanced motor skills relative to the mice in the control group administered a placebo.
* State that the experiment should be repeated 2-5 more times to further increase credibility of experimental findings/results.

[vox nihili]

* Large sample of organisms. Make sure that they are of relatively the same age, size, height, health.
* Divide the organisms into your experimental group/s and your control group.
* Show what will be different between the experimental and control group. E.g. 50 of the 100 mice with HD will be given the ___ drug (experimental group), while the other 50 mice with HD will be given a placebo (control group).
* Indicate that you will control variables between the groups (including space, temperature, light, food, water, etc). Nominate that you'll be doing this.
* Indicate the time frame and integrate what results would support the hypothesis; make a comparison. For instance: The hypothesis would be supported if the mice administered the drug had a greater survival rate and more enhanced motor skills relative to the mice in the control group administered a placebo.
* State that the experiment should be repeated 2-5 more times to further increase credibility of experimental findings/results.

* Divide the organisms randomly into your experimental group/s and your control group.

[swagsxcboi]

* Large sample of organisms. Make sure that they are of relatively the same age, size, height, health.
* Divide the organisms into your experimental group/s and your control group.
* Show what will be different between the experimental and control group. E.g. 50 of the 100 mice with HD will be given the ___ drug (experimental group), while the other 50 mice with HD will be given a placebo (control group).
* Indicate that you will control variables between the groups (including space, temperature, light, food, water, etc). Nominate that you'll be doing this.
* Indicate the time frame and integrate what results would support the hypothesis; make a comparison. For instance: The hypothesis would be supported if the mice administered the drug had a greater survival rate and more enhanced motor skills relative to the mice in the control group administered a placebo.
* State that the experiment should be repeated 2-5 more times to further increase credibility of experimental findings/results.

Thanks Yacoubb! 

[swagsxcboi]

define vestigial structure and fossil

[Yacoubb]

define vestigial structure and fossil

A vestigial structure is a functionless remnant of a structure found in a species of organism, that once functional in the ancestral species.

A fossil is a direct or indirect piece of evidence of prehistoric life.

Hope this clarified things (:

[swagsxcboi]

A vestigial structure is a functionless remnant of a structure found in a species of organism, that once functional in the ancestral species.

A fossil is a direct or indirect piece of evidence of prehistoric life.

Hope this clarified things (:

Cheers Yacoubb 
are the two hypotheses about hominin evolution part of the study design? Out of Africa and Multi regional
they don't appear to be but the 2013 prac vcaa paper has a MC question on it

[Yacoubb]

Cheers Yacoubb 
are the two hypotheses about hominin evolution part of the study design? Out of Africa and Multi regional
they don't appear to be but the 2013 prac vcaa paper has a MC question on it

I believe they are on the study design but in a really subtle way. So knowing about what the hypotheses are would be sufficient.

 

[swagsxcboi]

I believe they are on the study design but in a really subtle way. So knowing about what the hypotheses are would be sufficient.

Thanks Yacobb