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Author Topic: [IMPORTANT]20/5/2010 Biology Paper 6  (Read 18970 times)

Offline Shazizzzle

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Re: 20/5/2010 Biology Paper 6
« Reply #75 on: May 19, 2010, 09:29:03 pm »
Quote from: Baladya on May 19, 2010, 09:25:39 pm
ofc towards. Positive means towards ( warever that is)

Yeah. Just confirming. because one of my friends confused me. :S
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Offline Burhan.arshad

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Re: 20/5/2010 Biology Paper 6
« Reply #76 on: May 19, 2010, 09:50:21 pm »
do we have to make a best fit curve or joint line by ruler point to point?
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #77 on: May 19, 2010, 09:51:43 pm »
For Q.3) b) (Attached photo):

Why is green dominant and white recessive?
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #78 on: May 19, 2010, 09:52:07 pm »
Quote from: Burhan.arshad on May 19, 2010, 09:50:21 pm
do we have to make a best fit curve or joint line by ruler point to point?

Any is fine.  You'll get credit for either.
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Offline Shazizzzle

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Re: 20/5/2010 Biology Paper 6
« Reply #79 on: May 19, 2010, 09:54:23 pm »
Quote from: Ivo on May 19, 2010, 09:51:43 pm
For Q.3) b) (Attached photo):

Why is green dominant and white recessive?

There are clearly more green than white, proving that green was dominant, and by being so, produced more green than white.
As all conditions, homozygous dominant, or hetrozygous, will have green. so that's majority. Only homozygous recessive will have the white phenotype. So green is more!!
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Offline zioziozio

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Re: 20/5/2010 Biology Paper 6
« Reply #80 on: May 19, 2010, 09:54:57 pm »
Quote from: zioziozio on May 19, 2010, 08:03:29 pm
hey guys what's the bubble experiment ?? .. please help


neone ppl ?
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Offline Burhan.arshad

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Re: 20/5/2010 Biology Paper 6
« Reply #81 on: May 19, 2010, 09:56:48 pm »
Quote from: Ivo on May 19, 2010, 09:52:07 pm
Any is fine.  You'll get credit for either.

r u sure that both r right.....because smebody told me tht only best fit corve is creditted
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #82 on: May 19, 2010, 09:59:12 pm »
Quote from: Burhan.arshad on May 19, 2010, 09:56:48 pm
r u sure that both r right.....because smebody told me tht only best fit corve is creditted

No joining dot to dot is also fine.  Look in the mark schemes, especially the Winter 09 ones :)
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #83 on: May 19, 2010, 10:00:29 pm »
Quote from: Shazizzzle on May 19, 2010, 09:54:23 pm
There are clearly more green than white, proving that green was dominant, and by being so, produced more green than white.
As all conditions, homozygous dominant, or hetrozygous, will have green. so that's majority. Only homozygous recessive will have the white phenotype. So green is more!!

Oh I see, and 3:1 ratio of offspring is only because of heterozygous parent genotypes right?
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #84 on: May 19, 2010, 10:05:06 pm »
In the mark scheme it says method of measuring uptake is bubble method.

What is this?
« Last Edit: May 19, 2010, 10:06:54 pm by Ivo »
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Offline NidZ- Hero

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Re: 20/5/2010 Biology Paper 6
« Reply #85 on: May 19, 2010, 10:06:35 pm »
Quote from: Shazizzzle on May 19, 2010, 09:12:28 pm
Umm, in maggots (no, not you guys. :P That would be faggots XD ;) ), is positive phototaxis TOWARDS light or away from it?
taxes is nt dere in 2010 syallabus its out
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #86 on: May 19, 2010, 10:07:32 pm »
For M/J/08 Paper 6, Q.3)b)i):

How do we measure the distance grown (mm) accurately from the diagram.  The pollen tube is not a straight line so how do we measure it?

Q.3)a)ii)

Where is the micropyle?  Is it the whole in between C at the right-hand side?  The big hole?

Which colour is correct?

Guys see the link below.  This is such a hard question!

https://studentforums.biz/index.php/topic,7969.msg211375.html#msg211375
« Last Edit: May 19, 2010, 10:09:07 pm by Ivo »
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Offline Ivo

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Re: 20/5/2010 Biology Paper 6
« Reply #87 on: May 19, 2010, 10:07:58 pm »
Quote from: Nidzzz on May 19, 2010, 10:06:35 pm
taxes is nt dere in 2010 syallabus its out

Tropism is isn't it?
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Offline NidZ- Hero

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Re: 20/5/2010 Biology Paper 6
« Reply #88 on: May 19, 2010, 10:13:33 pm »
Quote from: Ivo on May 19, 2010, 10:07:58 pm
Tropism is isn't it?
tropism is for plants which is dere and taxes is for simple invertebrates which not dere in 2010 igcse bio : :)
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Offline haris94

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Re: 20/5/2010 Biology Paper 6
« Reply #89 on: May 19, 2010, 10:27:07 pm »
really?  :o
r u absolutely sure?  ::)
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