VCE Biology Question Thread

[katiesaliba]

Did Homo sapiens evolve from erectus or heidelbergensis


Does recombination occur in prophase 1 and independant assortment in anaphase 2

Heidelbergensis (intermediate species between erectus and sapiens), but I don't think that this would be a VCAA question. They would probably give you a timeline graph/cladogram thing and ask you to interpret it.

Recombination occurs during prophase I.
Independent assortment occurs during metaphase I.

[anat0my]

Have an affected mother with all affected sons.

Isn't that dominant though? Trying to wrap my mind around this...

[That Other Guy]

Isn't that dominant though? Trying to wrap my mind around this...

Because the trait is X linked there only needs to be one copy of the allele, as males have the genotype XY. The allele could be for the recessive or dominant condition.

[katiesaliba]

Can organelles be recycled?

Yeah, but mitochondria and the nucleus are broken down.

Isn't that dominant though? Trying to wrap my mind around this...

Yeah, the mother can be either affected or unaffected. So, both parents may be unaffected and give rise to affected sons, but the mother will be a carrier (which is represented by a dot)

[That Other Guy]

Can organelles be recycled?

I don't believe so. It would be hard to image that a macrophage engulfs fragments of a cell but does not digest certain organelles because other cells are in need of them.

EDIT: I researched it and it does seem like some organelles can be retained, except the nucleus and the mitochondria. How they are recycled is far beyond the scope of the course, though. I doubt that we will be asked about it.

[anat0my]

Is it a bad idea to do a practice exam today? Old vcaa ones?

[gunsforhands]

okay help pls. do we need to know about positive and negative feedback mechanisms ?? super confused

[katiesaliba]

Is it a bad idea to do a practice exam today? Old vcaa ones?

I'm going to do the 2013 one today :')

okay help pls. do we need to know about positive and negative feedback mechanisms ?? super confused

No longer on the study design!

[doomdestroyer]

Is it a bad idea to do a practice exam today? Old vcaa ones?

It depends on the person really, personally i just go through notes the day before exams, maybe do some practice SA questions.

[anat0my]

It depends on the person really, personally i just go through notes the day before exams, maybe do some practice SA questions.

True. How are you guys planning to approach reading time. I'm torn between doing MC during reading time or analysing SA. Both have their benefits.

[doomdestroyer]

True. How are you guys planning to approach reading time. I'm torn between doing MC during reading time or analysing SA. Both have their benefits.

That is a really good question, i personally aim for going through SA questions and reading all the information in them, if there is a multiple choice question that i come upon during writing time that links to one of the SA questions, i can use the information in it to help me decide what the answer is.

[gunsforhands]

No longer on the study design!

thank god, i thought it wasnt but then some people were talking about it and i was like WHAT !! thanks heaps

[Reus]

There will be 15 SA's any predications you guys might think be on there?

[katiesaliba]

There will be 15 SA's any predications you guys might think be on there?

Isn't there only 12? 

True. How are you guys planning to approach reading time. I'm torn between doing MC during reading time or analysing SA. Both have their benefits.

I like to spend most of my time reading through the SA, grasping what the questions are asking and determining which questions will take longer to answer. Then I look through the MC and remember the answers to some of the questions

[katiesaliba]

Is the endosymbiotic theory still assessable? Only came across it once in an old VCAA exam.