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thanks a lot! may God bless u and u get straight A*s! but what was the thread method of measuring the length of the plant?Organism Growth:
Planning Questions:
- source: corn syrup, glucose, protein, low grade NH3
- never write nutrient broth
- mention 2 examples at least
- same amount or conc of nutrient broth to the two sets of specimen
- the nutrient supply must be kept constant
- mention flow rate through fermenter
- For batch culture: note the amount of time the organism is left in the fermenter
- keep in mind the O2 supply, temperature, pH
- sterility of the fermenter is very important [so that no other organism grows and acts as a competitor]
- sterility is important in both batch and continous culture- in fact, every time you set up a batch culture, sterility must be mainatained
Reliability:
- decide what the experiment is on (like diffusion, osmosis, photosynthesis)
- use the same apparatus; describe what you're going to vary and what must be kept constant- decide which is the dependant and independant variable (eg light intensity? CO2 conc? or gas produced?)
- how will you vary (count bubbles? use gas syringe?)---always ask yourself: is it a comparison
- units--same volume, same mass, same concentration
- What are the constants? How will you keep them constant?
- give brief discription of the steps; if time is required, BE SPECIFIC.
- inference: in some exps you need a control, but don't write anything which isn't required otherwise
- precautions (FREE MARK!!!)
> give time for caliberation
(Calibration time is adjusting time)
>Repeat 3 times to be certain that the results are consistent-do not change the parameter
>large sample size
Why repeat?
Accuracy:
- increases the certainty that the results are consistent
- so that anomalous results can be removed
- permit variance from mean
- to take an average
- means measuring in a reliable manner. Eg
- weighing scale
- thermometer
- verneir caliper
- measuring cylindrer
- gas syringe
Control:
- use of a buffer solution to maintain pH
- using sol of known conc (by serial dilution)
- comparing colors of sol by a colorimeter
- larger number of known conc
- washing syringes and pipettes
- mixing and stirring for uniformity to prevent settling of suspension
- in microscopy: eye-piece graticule
- to measure the surface area, the specimen is placed on a grid, where the full squares, half or more than half are taken into consideration
- FILTERING AND CENTRIFUGING: the suspension spins and the more dense sinks at the bottom
- in an exp with living organisms, the control must be a dead organism
- whatever factor is being used in the question is emitted from the control
- For counting chromosomes and making them visible, the growing regions of the plant are cut
- cut surface of the specimen
- chromosomes are counted by placing cut surface under a high power light microscope(with high magnification)
- How to make chromosomes visible?
- > add dye/stain them
- > Examples of dyes:
So that's all that was dictated to me, I hope it is helpful inshAllah!
- methylene blue
- aceto-carmine
- aceto-orcein
Please someone tell me and explain
When is difference significant in chi squared test and when is it not significant?
Can you please send me the notes too and any tips if you have im really scared about p5
Can someone please help me with this?
I think if it's exposed to light meaning the light dependant reaction will increase so the electron acceptor will turn colourless of course. On the X axis I think it will be light intensity and on the Y axis I think colour change of electron acceptor. So with increasing light intensity the electron acceptor will change to colourless more quickly. So a straight line I'm guessing
think of it like this:Can someone please help me with this?
Can you please send me the notes too and any tips if you have im really scared about p5
Can you please send me the notes too and any tips if you have im really scared about p5
Can you please send me the notes too and any tips if you have im really scared about p5
Can you please send me the notes too and any tips if you have im really scared about p5
So how did the paper go?
How was it guys?
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