.

[silva]

wasn't the butterfly q A since they wanted to prevent extinction and they outlined that the butterfly populations where scattered thus no gene flow. So by putting them together, it allows for greater genetic diversity and therefore allow gene flow and prevent extinction.


also 23 was A because natural selection is unlikely to change the allele frequencies so dramatically in 3 generations. It takes much longer and it clearly emphasizes that a 'small' therefore genetic drift acted upon the population hence it was A not B.

Also 25 was B not D.

I got A also... and agree fully with this explanation... by placing all the butterflies in a single location where they are able to interbreed, the gene pool of this population would be much larger than the gene pools of the small isolated populations and hence greater genetic and phenotypic variation will result. this increased phenotypic variation will give the species of butterfly a better chance of survival

if you think about it the way VCAA is likely to, this would probably be the correct answer as they always liken preventing extiction to increasing genetic diversity (eg the qs later on in the paper about increasing genetic diversity in that near extinct species- cant remember which one)

[simpak]

Allllright, time to leave the thread again!

[kenhung123]

I think B is correct. The question states something like butterflies were laying eggs everywhere on those trees in 1957 people thought they were extinct and in 1978 they reappeared again. This suggested that by laying eggs everywhere they can survive. Hence, planting more of those trees for them to spread their eggs and increase likelihood to survive.

sorry but i don't think that's what they meant. if they where laying eggs everywhere on those trees then that suggests that in 1957 there was a lot of those trees and despite this they still got extinct. hence trees where not the problem

Because it takes a while for the eggs to develop a new population? They will think its extinct if theres like 100 butterflies in the area you will need like 1000's for it to be noticeable. How often do you see a butterfly?

[shinny]

But how does one seriously move all butterflies into one population?
Give 50,000 convicts nets?

That's how the British moved all the Aboriginals to isolation camps?

On a more serious note, as I said in another thread, stripping the eggs off the shrubs would work.

[Studyinghard]

guys just give up. theres no point. i doubt they will award 2 answers for this question. everyone has their own opinion. when the results do come out some will win and some will lose, thats how it all is. u cant change anything now. so just think about ur next exam, especially mavis:P go do yr 12!

[shea43]

guys just give up. theres no point. i doubt they will award 2 answers for this question. everyone has their own opinion. when the results do come out some will win and some will lose, thats how it all is. u cant change anything now. so just think about ur next exam, especially mavis:P go do yr 12!

+1

[Greggler]

for a bit of a mix up, why cant C be right?

[Studyinghard]

for a bit of a mix up, why cant C be right?

LOL, made my day

(not cuz i think its stupid or anything but just to confuse ppl more )

[qshyrn]

for a bit of a mix up, why cant C be right?

cuz ull burn everything up as well like the beneficial plants

[Greggler]

lol
anyway guys, stress less..
majority of state got raped by multi choice. My best friend who got 71/75 on mid year got 18/25 on MC according to what he thinks are the answers.
Anyone who got 20+ is doing excellent
and plus, there were plenty of redeemers on the SA (if you had time to finish... lol)

[simpak]

guys just give up. theres no point. i doubt they will award 2 answers for this question. everyone has their own opinion. when the results do come out some will win and some will lose, thats how it all is. u cant change anything now. so just think about ur next exam, especially mavis:P go do yr 12!

+1

+2 _{not this again!}

+3
ONLY, I don't wanna study

[Liv.]

man, I suck a bio. 51 total -goes to die-

[LFTM]

Oh my god we are not arguing about the Eltham butterfly populations again D:

It's DEFINATELY A.














only kidding.

[ferrim]

what marks will make up what grades?

estimations?

A+?
A?
B+?
B?
C+?
C?

[simpak]

"b The chemical code on the probe is the same as a sequence on the chemical code of the allele."

I just wanted to ask, I reread the wording but I find this question to be ambiguous also (surprise surprise).
Should it not be 'The chemical code on the probe is COMPLEMENTARY to the chemical code of the allele'?
Discuss.