[Dorkins]

(Original post by dongonaeatu)
no, its too late. I'm certain its prophase. If not, i've lost 2 marks, no biggy. I'm saying that in prophase, you start off with larger chromosomes. In the picture they were definitely a lot large and chunkier.

They don't change sizes between stages of mitosis though, and they were aligned along the metaphase plate.

[When you see it...]

How many of you lot are carrying on to A2?

[Dorkins]

(Original post by When you see it...)
How many of you lot are carrying on to A2?

I am. What about you?

[When you see it...]

(Original post by Dorkins)
I am. What about you?

Hopefully, but I'm not sure whether I'll be allowed to by my college. Also, I may even be switching colleges, so I might have to carry on with it if the college I switch to doesn't offer either physics or further maths to make sure that I'm studying enough subjects.
Apparantly the A2 is **** compared to the AS because the whole of unit 4 is ecology and stuff like that.

[EffKayy]

Just finished a chem pastpaper but just remembered one question:

The courtship one about different feather colours- what did you all say?

[When you see it...]

(Original post by EffKayy)
Just finished a chem pastpaper but just remembered one question:

The courtship one about different feather colours- what did you all say?

Different coloured feathers imply different courtship behaviour, which is species-specific in order to prevent interbreeding, therefore different colours mean different species. May be wrong but I hope I'll at least get a mark. I prefer the questions where they mention songs, because then you know that they are talking about courtship behaviour and not just traits.
I'm going to bed now.

[EffKayy]

(Original post by When you see it...)
Different coloured feathers imply different courtship behaviour, which is species-specific in order to prevent interbreeding, therefore different colours mean different species. May be wrong but I hope I'll at least get a mark. I prefer the questions where they mention songs, because then you know that they are talking about courtship behaviour and not just traits.
I'm going to bed now.

I talked about its species specific, different colours in the two species mean no recognition of the opposite sex --> female/male not attracted to mate of other species.........????????
Oh well..
Night.

[alexissocool]

(Original post by EffKayy)
I talked about its species specific, different colours in the two species mean no recognition of the opposite sex --> female/male not attracted to mate of other species.........????????
Oh well..
Night.

I swear the question was like explain evidence on throat colour from the table that Crimson blah blah and whatever the other one was called may be different species.

In that case it was the fact that the females from crimson blah blah and the other one had different throat colours as was the case for the males.

It was just simple interpretation of the table.

[bbk.momen]

(Original post by When you see it...)
Hopefully, but I'm not sure whether I'll be allowed to by my college. Also, I may even be switching colleges, so I might have to carry on with it if the college I switch to doesn't offer either physics or further maths to make sure that I'm studying enough subjects.
Apparantly the A2 is **** compared to the AS because the whole of unit 4 is ecology and stuff like that.

I do A2, yeah unit 4 was pretty much all Ecology, apart from the cycle of respiration. Nonetheless, quite an easy unit.
Unit 5 on the other hand is extremely involved with DNA, going into alot of detail with replication methods.

[AtomicMan]

(Original post by EffKayy)
I talked about its species specific, different colours in the two species mean no recognition of the opposite sex --> female/male not attracted to mate of other species.........????????
Oh well..
Night.

I talked about the same thing. Males have different colour tails, so they would have different courtship sequences, and different species have different courtship sequences, and that the females from other species wouldnt be attracted to male bird from other species

[pjanoo]

is the phrase 'a mutation in an allele' biologically correct?

[AtomicMan]

(Original post by EffKayy)
Yeeah, but profit can be in other ways too, i.e. cost benefit,
so more sugar grown so no other resources needed or whatever to
boost the growth up e.g. fertilisers. so cost benefit.

Hope so anyways ,

kthanks

I said about how because they grow fast, less time needed to grow them, so less money spent on wages for workers

[AtomicMan]

(Original post by dongonaeatu)
no, its too late. I'm certain its prophase. If not, i've lost 2 marks, no biggy. I'm saying that in prophase, you start off with larger chromosomes. In the picture they were definitely a lot large and chunkier.

The picture showed the chromosomes in the middle, and the spindle fibres were attached to their centromeres, it was definantly metaphase

[hus11128386]

I dint like that mitosis/cell cycle question... spent like 10 minutes on it trying to identify if it was prophase or metaphase... i put prophase in the end... because there were like 2 chromotids that weren't lined up in the equator so i thought its prophase.. and i put that its when chromosomes become visible.. nuclear envelope disintergrates..

nway1 do the same?

[hus11128386]

(Original post by AtomicMan)
The picture showed the chromosomes in the middle, and the spindle fibres were attached to their centromeres, it was definantly metaphase

but they wo like 1 chromosome out of the equator... like it werent lined up... oh i dunno........ this is jus stressin me out.. i spent like 15 mins on dat..

[hus11128386]

nways bye guys am goin to do chem now...ant even started it. :/

[doctorzing]

ok don't know if this is a stupid question but for the very first answer I put :
osmosis not diffusion as the organism was living in water and the o2 could be obtained form the H20. Thoughts?

[pepeeglesfield]

(Original post by doctorzing)
ok don't know if this is a stupid question but for the very first answer I put :
osmosis not diffusion as the organism was living in water and the o2 could be obtained form the H20. Thoughts?

yeah but it is the diffusion of the O2 through the skin surface

[emah123]

For the question with the graph that had rate of flow and pressure on it: for the first question which was describe the rate of flow I put water is lost through the leaf through transpiration. This lowers the water potential in the leaf. Water is drawn up the xylem. This lowers the water potential in the root and water moves in through the root via osmosis.hence increasing the rate of flow.

I realise now that I didn't actually use the graph and was wondering what I actually should've put. Can someone tell me the right answer? And how many marks might I get for my answer out of the 3 available??

[Waki]

Is there a mark scheme anywhere for this exam?