Post Exam Discussion

[bridgetkelly123]

I put that ocean predators were introduced in the middle of the time period, creating a selective advantage for a large dorsal spine as it would scare away the predators. Then the predator died out and spine sizes returned to normal gradually.

Do you think that would be right/get a mark??

I literally had no idea, just went majorly general and said that the phenotypic makeup of the fish population changed in response to the changing selection pressures of their lake environment.

Pretty sure I was too general in like 50% of questions - I'm really not optimistic at all any more.....

Was the trait supposed to be X linked?

[Biology24123]

I said out of africa wtf?
How is it multi regional wow i cant believe i did not realise this, add another 5 marks to my misfortunes...

I said out of africa because it said modern humans came from africa, and that modern humans did not share neanderthal DNA. wow....

Don't worry. If you didn't get it then no one did

[The Peasant]

I just said the change of water salinity

Damn. I screwed it up then. Wasn't specific enough. Did it say anything about salt/ocean water and the dorsal etc traits in the stem question? I just wrote that the selection pressures changed drastically for a period of time, which selected for "" traits.

[BakedDwarf]

Damn. I screwed it up then. Wasn't specific enough. Did it say anything about salt/ocean water and the dorsal etc traits in the stem question? I just wrote that the selection pressures changed drastically for a period of time, which selected for "" traits.

No, i you're right as well. You basically explain the same idea

[cosine]

Don't worry. If you didn't get it then no one did

how do you know multiregional was the answer im so depressed rn

[julijulib]

how do you know multiregional was the answer im so depressed rn

my teacher said it was out-of-africa so idk

[BakedDwarf]

my teacher said it was out-of-africa so idk

same.

[cosine]

what did guys get for the DNA mc question, antiparallel or double helix?

and the linked genes... oh man... what did you circle ?

[BakedDwarf]

what did guys get for the DNA mc question, antiparallel or double helix?

and the linked genes... oh man... what did you circle ?

Antiparrallel

I think i circled the second one (i don't really remember)

[Yacoubb]

Do you have the exact question for the mutli-regional or Out of Africa Hypothesis question? I may be able to answer it and give my 2 cents...

[Biology24123]

how do you know multiregional was the answer im so depressed rn

I don't know guys. My teacher said it was multi regional. Maybe they accept both

[cosine]

same.

they better give us marks for out of africa because:

It said AFRICAN DESCENDED HUMANS did NOT have Neanderthal DNA, and hence they did not interbreed = out of africa
Where as multi regional, even the african descended humans would have neanderthal DNA because interbreeding would be common

Such an ambiguous question...

[Biology24123]

Antiparrallel

I think i circled the second one (i don't really remember)

Pretty certain it was the 2nd one

[cosine]

Antiparrallel

I think i circled the second one (i don't really remember)

same but what did you support it with? I made up the biggest bs...

[BakedDwarf]

Well, i think i need to put this stupid bio exam behind me and focus on the upcoming further exam