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Explain, using an appropriate example from agriculture, why selective breeding has been practised Analyse and present information from secondary sources to trace the history of selective breeding of one species for agricultural purposes and use available evidence to describe the series of...

I was looking at the prac we did, and we just let the soda water sit and decarbonate...we didn't do anything to it. Is this acceptable? I was looking at the csu site and they were saying the 2 methods were heating and salting...so i wasn't sure if i should change mine?

I'm a bit confused about methylation/demethylation and acetylation/deacetylation. I'm just going to outline my shaky understanding, so if someone could clarify, correct or confirm that would be very helpful! Unpacking of DNA involves DNA demethylation and histone acetylation Methylation and...

are we supposed to do an open ended investigation? I don't think we did...so if we are can someone explain theirs to me plz!!

Perform a first-hand investigation to gather information and describe the properties of a named emulsion and relate these properties to its uses Could someone out there who actually did perform a first hand investigation for this point plz give me a run down - thanks.

"Describe the contribution of Pasteur and Koch to our understanding of infectious diseases" In class for Pasteur I remember that we talked about the swan-necked flask experiment and spontaneous generation...but now I'm finding information in text books about the "germ theory of disease" which...

I need some help with this dot point: Analyse the benefits and problems associated with the use of radioisotopes in identified industries and medicine If someone could fill me in, that would be very much appreciated.

Hi, I'm a year 12 student who has been looking at these degrees, and just wondered if anyone could point out the differences and which is most suitable for me. I'm interested in communicating science through a job in perhaps medical information or maybe science journalism...I'm not particularly...

describe the way in which transposable genetic elements operate and discuss their impact on the genome I realised during my revision that I have no idea about the answer to this dot point. All I can gather is that they are "jumping genes", but that doesn't really help, as I don't really...

Would someone plz clarify what antibodies actually do? Are they just like markers?

I have an assignment on a couple of dot points relating to the replacement of natural products with synthetic alternatives. Does anyone have any suggestions for a good product to use??

could someone plz explain the different behaviours of conc. and dilute sulfuric acids when they act as oxidising agents? thanx.

hi - I'm a year 12 student currently looking into a science/communications type degree, and wondered if anyone out there who does the degree or knows anything about it could give me a bit more info on what the degree is like and what subjects are involved etc. Thanks!

Could someone plz confirm for me the effect of changing pressure (or volume) on equilibrium...i keep getting it all confused.

I'm ok with the theory behind AAS and how the machine works, but I'm really struggling with answering questions relating to AAS - the ones where you are required to work out the concentrations of samples and graph calibration curves etc. I really can't get my head around the process. Plz help!