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March 30, 2024, 12:12:04 am

Author Topic: VCE Biology Question Thread  (Read 3571745 times)  Share 

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Biology24123

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Re: VCE Biology Question Thread
« Reply #6765 on: October 25, 2015, 11:03:40 pm »
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(CSE 2014 test)
The answer for this question is B.
But I thought only nucleated cells, not bacteria,  have MHC class 1 markers? Or am i mistaken.  :(

(Image removed from quote.)

I also just did this exam and said D

Acid

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Re: VCE Biology Question Thread
« Reply #6766 on: October 26, 2015, 01:39:51 pm »
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Is option B correct because only two kinds of rockress can undergo meiosis since the're diploid? So why is C incorrect? Could someone please clarify this? Thanks!
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warya

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Re: VCE Biology Question Thread
« Reply #6767 on: October 26, 2015, 03:06:50 pm »
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Is option B correct because only two kinds of rockress can undergo meiosis since the're diploid? So why is C incorrect? Could someone please clarify this? Thanks!

All the cells are diploid, the problem is, the odd numbered diploid cells cannot produce fertile gametes/reproduce by seed i.e. they cannot produce haploid cells because you cant divide an odd number by 2.
http://i.imgur.com/VK9S9ET.gif

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Acid

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Re: VCE Biology Question Thread
« Reply #6768 on: October 26, 2015, 04:08:49 pm »
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All the cells are diploid, the problem is, the odd numbered diploid cells cannot produce fertile gametes/reproduce by seed i.e. they cannot produce haploid cells because you cant divide an odd number by 2.

Yup, I understand that, but why is option C incorrect? Aren't organisms with odd number of chromosomes usually haploid? Or can we assume they're a product of non-disjuction?

Thanks!
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cosine

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Re: VCE Biology Question Thread
« Reply #6769 on: October 26, 2015, 04:14:43 pm »
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How exactly do two identical twins form? Does the same egg/sperm get fertilised by the same gamete?
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sunshine98

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Re: VCE Biology Question Thread
« Reply #6770 on: October 26, 2015, 04:18:03 pm »
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How exactly do two identical twins form? Does the same egg/sperm get fertilised by the same gamete?
No , one fertilised egg splits to form two babies with the same genetic material.

cosine

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Re: VCE Biology Question Thread
« Reply #6771 on: October 26, 2015, 06:22:45 pm »
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Few questions about hominin evolution:

1. I understand the two theories now, thankfully... But for the Out-of-Africa theory, it says that modern humans evolved INSIDE Africa, and then dispersed around the world in waves. So, that means that transitional fossils of modern humans must ONLY be found inside africa, right?

But a statement in my book said that Homo erectus migrated from Africa into Europe.. Does this mean that Homo erectus is not an ancestor of modern humans?

When it says transitional fossils, it means that the direct ancestors of humans, right? Like the very hominin species that modern humans evolved from were only in Africa?

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CarterGray12

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Re: VCE Biology Question Thread
« Reply #6772 on: October 26, 2015, 06:39:27 pm »
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Hey everyone, I'm struggling a bit with the trends in evolution from Australopithecus to Homo Sapiens, can anyone give me some bullet points on the general trends?
Also, what feature define Hominoids?

Thanks in advance
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Biology24123

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Re: VCE Biology Question Thread
« Reply #6773 on: October 26, 2015, 06:43:56 pm »
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Hey everyone, I'm struggling a bit with the trends in evolution from Australopithecus to Homo Sapiens, can anyone give me some bullet points on the general trends?
Also, what feature define Hominoids?

Thanks in advance

Decreased eye ridge
Increased brain case
Face becomes less sloped
Spine becomes S shaped
More central Foramum Magnum
Pelvis is more narrow



sushibun

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Re: VCE Biology Question Thread
« Reply #6774 on: October 26, 2015, 06:54:52 pm »
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Hi Guys,
I was wondering whether a question like the one I've attached below could possibly be on an exam?
Or if the theory behind this question outside the study design?
Thanks :)

KingDrogba

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Re: VCE Biology Question Thread
« Reply #6775 on: October 26, 2015, 07:00:53 pm »
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Can someone explain what to what detail we need to know about the Repressor and Promoter regions on a gene.
Thank you!
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vox nihili

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Re: VCE Biology Question Thread
« Reply #6776 on: October 26, 2015, 07:20:27 pm »
+1
Hi Guys,
I was wondering whether a question like the one I've attached below could possibly be on an exam?
Or if the theory behind this question outside the study design?
Thanks :)

Outside of course

Can someone explain what to what detail we need to know about the Repressor and Promoter regions on a gene.
Thank you!

That they exist, essentially. That's all
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Biology24123

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Re: VCE Biology Question Thread
« Reply #6777 on: October 26, 2015, 07:36:00 pm »
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What's the answer to this

cosine

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Re: VCE Biology Question Thread
« Reply #6778 on: October 26, 2015, 07:39:33 pm »
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What's the answer to this
Pretty sure it's D because these are underneath the neck, and are an example of a different characteristic in A. afarensis than in humans.
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cosine

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Re: VCE Biology Question Thread
« Reply #6779 on: October 26, 2015, 07:40:40 pm »
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How much do we need to know about Oestrus synchronisation?

 
2016-2019: Bachelor of Biomedicine
2015: VCE (ATAR: 94.85)