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holyduckie

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holyduckie

Sexual Reproduction / Genetic Variation

If humans can only reproduce by sexual reproduction, how can create at the same time 1. an all female world 2. genetic variations in the offsprings ? Thanks!
11:45 Tue 30th Jan 20072 answers, last by StudentGal 17:19 Mon 05th Feb 2007
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holyduckie

Ammonium Diuranate

Can anyone give me a full chemical equation of the process of adding ammonia into UO2{2-} ions to get ammonium diuranate ( also known as ammonium uranium oxide OR yellowcake ) ? Thanks!
07:59 Sun 08th Oct 20061 answer, last by JustSia 11:18 Sun 08th Oct 2006
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holyduckie

Spider's Webs

1. Why can spiers avoid being trapped by their own webs ? 2. What else do spiders use ther web for besides catching prey ? Thanks in advance!
13:04 Fri 15th Sep 20063 answers, last by naz_nomad 22:21 Fri 15th Sep 2006
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holyduckie

Khlong Toei (new)

Can someone help me suggest some sites or ideas on developing a housing project scheme in Khlong Toei ( in Bangkok, Thailand )? Thanks in advance! P.S. sorry for the unclear definition of 'housing'. I...
11:34 Tue 22nd Aug 20061 answer, last by heathfield 12:19 Tue 22nd Aug 2006
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holyduckie

Khlong Toei

Can someone help me suggest some sites or ideas on developing a housing project scheme in Khlong Toei ( in Bangkok, Thailand )? Thanks in advance!
05:21 Tue 22nd Aug 20063 answers, last by DotH 11:09 Tue 22nd Aug 2006
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holyduckie

More on bacteria

Here are more questions on bacteria : 1. What are some roles played by E.coli in daily life? ( I know they digest, but is there anything else?) 2. What are the factors leading to the contamination of...
07:08 Sun 09th Jul 200610 answers, last by theprof 18:55 Tue 11th Jul 2006
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holyduckie

Chemical Reactions

Why does the chemical reaction inside a light stick speed up when heat is intoduced? Thanks for answering !
14:32 Wed 26th Apr 20063 answers, last by shammydodger 02:31 Thu 27th Apr 2006
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holyduckie

How heat affects objects

How does heat ( including coolness ) affect these objects ? (i) The brightness ( light output ) of light sticks (ii) Magnetism of magnets Can someone also provide some websites for my reference ?...
08:29 Mon 17th Apr 20064 answers, last by fo3nix 20:29 Mon 17th Apr 2006
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holyduckie

Density of wood and Iron

A block of wood with a piece of iron on top is floating on water. A mark is made on the wooden block to indicate the water level. If the iron were suspended beneath the wood and the whole system is...
13:39 Mon 10th Apr 20064 answers, last by stanleyman 20:10 Tue 11th Apr 2006

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