Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
MKh:
Salaam all, I have a few qns....I hope u guys will be able to help to your best.
1) what is the difference between random error and systematic error?
2) what is the difference between a belt transect and a line transect?
Have you guys got any pics of belt transect and line transect in your books, guides, notes etc. I want to know how each one looks to make their difference clearer.
Tried googling this and got answers but they were not very clear and people over here have better info than google :) so please share your info. thanxx...:)
Master_Key:
--- Quote from: MKh on April 19, 2011, 11:44:05 am ---Salaam all, I have a few qns....I hope u guys will be able to help to your best.
1) what is the difference between random error and systematic error?
2) what is the difference between a belt transect and a line transect?
Have you guys got any pics of belt transect and line transect in your books, guides, notes etc. I want to know how each one looks to make their difference clearer.
Tried googling this and got answers but they were not very clear and people over here have better info than google :) so please share your info. thanxx...:)
--- End quote ---
1) The main Diff. is one can be corrected by repeating experiment but other cannot.
~ Miss Relina ~:
--- Quote from: Master_Key on April 19, 2011, 01:31:40 pm ---1) The main Diff. is one can be corrected by repeating experiment but other cannot.
--- End quote ---
and that one which can be corrected by repetition is the random ;D
Amelia:
--- Quote from: moalna on April 19, 2011, 11:21:55 am ---1. Explain why base pairs are a suitable way of measuring length of a piece of a DNA?
--- End quote ---
DNA is measured in base pairs because it is usually double-stranded. Hence, the number of total base pairs is equal to the number of nucleotides in one of the strands (with the exception of non-coding single-stranded regions of telomeres).
--- Quote ---2. Explain why (1) Penicillin, (2) Tetracyclin and (3) Quinolones are not effective against viruses?
--- End quote ---
Because they are antibiotics and hence, used for fighting bacterias and not viral infections.
moon:
Can u please help me in these questions
1) Explain what is meant by the term genetic carrier?
2) One of the polypeptide chains in the haemoglobin of a person with sickle cell anaemia has a change in one of its amino acids.Explain how change in
DNA can lead to a change in a single amino acid in polypeptide chain.
I appreciate ur help!!
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