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bad8oy
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#1541
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#1541
(Original post by Sum786)
isn't 120 the maximum UMS for BIOL2?
140


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looloo4
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#1542
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#1542
Hi again,
Does anyone know if we have to know the process of conjugation in horizontal gene transmission in bacteria?
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eilish1903
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#1543
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#1543
(Original post by Sum786)
isn't 120 the maximum UMS for BIOL2?
100 for BIOL1
140 for BIOL2
60 for the ISA

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eilish1903
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#1544
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#1544
Yeah u do

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zbert
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#1545
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#1545
So I think I get meiosis now.
It is Mitosis except:
in Prophase you get crossing over
in Anaphase the centromeres don't separate so the whole chromosome is pulled to the poles of the cell
then telophase as in mitosis except you have chromosomes instead of chromatids
then cytokinesis, and mitosis as normal on the 2 cells.

Is this correct?
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Paulineuh
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#1546
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#1546
(Original post by looloo4)
Hi again,
Does anyone know if we have to know the process of conjugation in horizontal gene transmission in bacteria?
Yes!
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denteddental
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#1547
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#1547
(Original post by Sum786)
Do we need to know this for BIOL2? i haven't come across it ;/
Its on P166 in the Nelson thornes book.
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denteddental
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#1548
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#1548
(Original post by Swords N Thorns)
Which one is this?
Its on P166 in the Nelson thornes book.
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Sum786
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#1549
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#1549
how many marks would you need to get in the paper to get 120 UMS
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sikhtank27
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#1550
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#1550
(Original post by Nav_Mallhi)
Its on P166 in the Nelson thornes book.
Dyammmmmmm!!!!!!
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Jimmy20002012
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#1551
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#1551
(Original post by Sum786)
how many marks would you need to get in the paper to get 120 UMS
60-65 marks


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LiamDaly
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#1552
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#1552
I am confused.

If a daughter cell contains 23 chromatids when this fuses with another gamete surely you end up with 23 chromosomes.

23 chromosomes is not diploid.

What? Please
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Sapphire123
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#1553
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#1553
(Original post by Sum786)
how many marks would you need to get in the paper to get 120 UMS
It varies depending on the paper but in January 2013 it was 63/85 for 120 ums
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username504651
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#1554
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#1554
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah
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zbert
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#1555
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#1555
(Original post by lauraaaaa)
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah
(new-old)/old then x100
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Swords N Thorns
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#1556
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#1556
(Original post by lauraaaaa)
I'm thick so can somebody remind me how to calculate the percentage increase and decrease? Is it something like difference between original and new divided by the original x100? I think I'm making that up hahah
Increase:
Finishing value - starting value / starting value * 100

Decrease:
Starting value - finishing value / starting value * 100

Feel free to correct me?
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denteddental
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#1557
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#1557
(Original post by sikhtank27)
Dyammmmmmm!!!!!!
:doh::facepalm:

You again?
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Mr boombang
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#1558
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#1558
Hi guys,
Can anyone tell me what is a potometer?!... there was question about this in a past paper cant remember which year, but yh didnt have a clue what it was!!
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zbert
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#1559
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#1559
(Original post by zbert)
So I think I get meiosis now.
It is Mitosis except:
in Prophase you get crossing over
in Anaphase the centromeres don't separate so the whole chromosome is pulled to the poles of the cell
then telophase as in mitosis except you have chromosomes instead of chromatids
then cytokinesis, and mitosis as normal on the 2 cells.

Is this correct?
I'M DESPERATE !!! :confused:
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Sapphire123
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#1560
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#1560
is there only 2 experiments that we need to know about
1- using the potometer to measure rate of water uptake
2- counting the number of stomata by using an optical microscope

Is there any more?
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