VCE Biology Question Thread

[lyoko]

Dot points are fine, I'm sure  I would especially use them in questions that ask you to explain a process

Thank-you very much

[purplegiraffe]

so neanderthals brains were bigger than homosapiens??

[Willba99]

so neanderthals brains were bigger than homosapiens??

yeah quite a bit larger

[isobelj]

What ions enter the post-synaptic terminal after its receptors have been triggered by neurotransmitters??

Na+ leave the axon, and K enter the axon, if that's what you're asking?

[HSPLegend]

What ions enter the post-synaptic terminal after its receptors have been triggered by neurotransmitters??

Potassium and sodium ions, which then trigger an action potential along the axon.

[blacksanta62]

Yo, just some questions from the study design which I would like clarified:
1) When explaining genetic drift, are these definitions acceptable
genetic drift: chance events which lead to a change in allele frequency. In small populations, this can lead to the loss of favourable phenotypes (should I use alleles or phenotypes?)
The bottleneck effect: natural disaster which leads to the loss of alleles and phenotypes. The resultant population which can reproduce is small and an unrepresentative of the original population.
The founder effect: A small reproducing unrepresentative group of a larger population which leaves to colonise a new region.
2) What are some shared characteristics which define primates, hominoids and hominins?
Thank you

[purplegiraffe]

What are the characteristics of the genus homo?

[HasibA]

is dna synthesised in the 5 to 3 way, from the primer, in dna replication? always get confused on this haha, tyyy

[purplegiraffe]

is dna synthesised in the 5 to 3 way, from the primer, in dna replication? always get confused on this haha, tyyy

yeah. it is made in the 5 to 3 way, so then moves along the template strand in the 3 to 5 way

[AhNeon]

Are autoimmune responses cell mediated or mostly humoral?
Like, for immunosupressents, why do we suppress Tc cells and not B cells

[plsbegentle]

What are the characteristics of the genus homo?

Differences compared to australopithecus
-larger brain
-smaller teeth
-less prominent jaw
-less prominent brow ridge
-flattening of face instead of sloping
-devolpment in the use of tools, fire and later on clothing, burials and even more later, art, technology etc.

[guest123]

Yo, just some questions from the study design which I would like clarified:
1) When explaining genetic drift, are these definitions acceptable
genetic drift: chance events which lead to a change in allele frequency. In small populations, this can lead to the loss of favourable phenotypes (should I use alleles or phenotypes?)
The bottleneck effect: natural disaster which leads to the loss of alleles and phenotypes. The resultant population which can reproduce is small and an unrepresentative of the original population.
The founder effect: A small reproducing unrepresentative group of a larger population which leaves to colonise a new region.
2) What are some shared characteristics which define primates, hominoids and hominins?
Thank you

2) Hominoids includes all primates, shared characteristics is relatively large brain & opposable thumb, can;t think of too much more you usually are asked for differences

[blacksanta62]

2) Hominoids includes all primates, shared characteristics is relatively large brain & opposable thumb, can;t think of too much more you usually are asked for differences

What are some differences?
Thank you

[geminii]

Yo, just some questions from the study design which I would like clarified:
1) When explaining genetic drift, are these definitions acceptable
genetic drift: chance events which lead to a change in allele frequency. In small populations, this can lead to the loss of favourable phenotypes (should I use alleles or phenotypes?)
The bottleneck effect: natural disaster which leads to the loss of alleles and phenotypes. The resultant population which can reproduce is small and an unrepresentative of the original population.
The founder effect: A small reproducing unrepresentative group of a larger population which leaves to colonise a new region.
2) What are some shared characteristics which define primates, hominoids and hominins?
Thank you

1) Perhaps write 'chance events which lead to a change in allele frequency. In small populations, this can lead to the loss of alleles and therefore the loss of favourable phenotypes'
Bottleneck effect is good! So is founder effect

[plsbegentle]

2) Hominoids includes all primates, shared characteristics is relatively large brain & opposable thumb, can;t think of too much more you usually are asked for differences

also large foward facing eyes with 3d vision and colour.
Hominin includes the human species and their erect walking ancestors (australopithecus)
Hominoids includes human and great apes.
really what seperates hominin and hominoid is the bipedal gait of hominins.