.

[Studyinghard]

is anyone workin on a full set of solutions?

read first post tool

i think like most of the same answers as u . although the cultural evolution questions i thought there can be many answers. lets hope everyone agress with ur answers. although some of the mC's dodgy. whatever. this exam was gayXD

[shinny]

Haven't commented on this yet because I'm not comlpletely convinced  to either A or B. How does B equate to 'definitely increasing genetic variation'?

EDIT: Although I am pretty much 90% on A for those interested to know.

recombinations, mutations and such through more eggs etc

That comes with the assumption that access to such bushes were the limiting factor to begin with. My thought process behind this question is as follows;
1. There are now 6 populations at Kiata, 1 at Castlemaine, 0 at Eltham; hence the environmental conditions at Eltham are not suited to the genetic characteristics of the small initial population.
2. Hence, the initial population migrated in the direction of Kiata. Note how Kiata is further away from Eltham than Castlemaine, and hence its environmental characteristics would be more different.
3. That means a certain environmental characteristic in Kiata is more suited to the butterflies.
4. This environmental characteristic could have been the lack of bushes limiting reproduction.
5. However, this cannot be a certainty. There are plenty of possible factors. e.g. predators (NIGGERSAURUS!?) in Eltham eating them up.
6. In such a case, the best answer is A, in order to increase genetic diversity, and solve any possible factor, regardless of what it is.

EDIT: Once again, VCAA may decide to award two answers to this question as they have done in Biology exams many times. I do find it to be a bit ambiguous, but that's the best reasoning I can give you guys in order to conclude anything.

[silva]

With Q20 MC the Structural and Regulatory Gene Qs...

D could technically be correct possibly- "Mutations in DISTANT regulatory genes will have no effect on their related structural genes in eukaryotes"

because the mutation wont actually affect the structural gene itself, itll just affect its expression, hence the gene itself wont affected by the mutation just its operation!?!?

i still see how C is probably correct but possible not ALL (key word) regulatory genes are all in the chromosome

[Studyinghard]

idk whats happening with that butterflies question but im gonna stick with B. but i can see how A could be write. oh well could go either way

[Studyinghard]

btw could 12 b D. ?

[carolyne]

thanks for the solutions guysssss.

[minilunchbox]

With Q20 MC the Structural and Regulatory Gene Qs...

D could technically be correct possibly- "Mutations in DISTANT regulatory genes will have no effect on their related structural genes in eukaryotes"

because the mutation wont actually affect the structural gene itself, itll just affect its expression, hence the gene itself wont affected by the mutation just its operation!?!?

i still see how C is probably correct but possible not ALL (key word) regulatory genes are all in the chromosome

But it says ~related~ structural genes so there would be an effect of some extent.

[Greggler]

how can it be A..
your trying to avoid extinction in the THREE AREAS.. by moving them all to one area arent you going to lose populations in atleast two areas?

read the q..

[simpak]

True Greggler.
How could you move every single butterfly anyway? It's unreasonable.

The bushes is correct .

It's unreasonable because it's not quite possible but it doesn't ask what's possible; it asks what the best way to increase the genetic variation is.

[shinny]

how can it be A..
your trying to avoid extinction in the THREE AREAS.. by moving them all to one area arent you going to lose populations in atleast two areas?

read the q..

You can move them back after they've reproduced. Besides, going along with your interpretation, this means we'll have extinction in two; not three.

True Greggler.
How could you move every single butterfly anyway? It's unreasonable.

The bushes is correct .

Just strip all the shrubs of eggs. And as above, I don't think practicality is meant to be a consideration.

[shinny]

how can it be A..
your trying to avoid extinction in the THREE AREAS.. by moving them all to one area arent you going to lose populations in atleast two areas?

read the q..

You can move them back after they've reproduced. Besides, going along with your interpretation, this means we'll have extinction in two; not three.

True Greggler.
How could you move every single butterfly anyway? It's unreasonable.

The bushes is correct .

Just strip all the shrubs of eggs. And as above, I don't think practicality is meant to be a consideration.

Hang on.
Question says:
Small pop at (Eltham)
Small pop at (Castle.)
6 places in Kiata.

If you moved them all into one area, why? What's the point? If they are surviving in other areas, put more bushes there? Increase numbers.

The best option -> put more trees in Elthanm and Castle so that more can reproduce.

This is quite cyclical really. I could counter-argue that if I want to, but then I can think of counter-arguments to my own counter-arguments. There's too many ambiguities, or more specifically, WHY did they move away from Eltham i.e. what selection pressure was there.

[Greggler]

you could just imagine the exam setting panel. with these ambiguos questions they mean to piss us off. same as for the subjective q on humans influencing selective pressures; could just imagine some examiner having a little chuckle to themselves

[Greggler]

lol anyway,, im quite happy with my overall result/prediction
19-22/25 on MC (lol, ambiguity)
44-46/50 on SA

i reckon im around 65/75, which should hopefully secure an A+

[strathyboy23]

i reckon im around 65/75, which should hopefully secure an A+

the way its looking 65/75 will be a very good score..unless ofcourse vcaa start handing out marks because of their beautifully worded questions

[minilunchbox]

Hahah !
They were already in one area though.
I'm sticking with B, it is impossible and a very good way as the butterflies will then multiply.

(Image removed from quote.)

Woo, I had B as well.