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CTAB is a surfactant used in the isolation of DNA from tissues containing high amounts of polysaccharides. Under the high-salt conditions of this protocol, CTAB binds the polysaccharides removing them from the solution. When combined with Arabidopsis, this procedure yields pure DNA.
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What is and important role in Soil biological components play?
they are key in soil feritity
Is important role of detrivore?
To help recycle nutrients in the soil
An important role of soil microbes in biological systems is the?
(A) recycling of matter
Role of proton pump in root hair cells?
acquire minerals from the soil
How can you prove that there is bacteria in soil?
One way is to culture the bacteria on a sterile agar plate with a small sample of the soil. After incubating the sample at about 20 degrees (Celsius) for a couple of days you should be able to see the bacteria, it's normally either a shiny patch or it's a yellowish colour. With soil though, there will most likely be a large amount of fungal growth, which you can identify by it's white, fuzzy appearance.
A typical soil sample is an example of a homogeneous mixture?
No, a typical soil sample is heterogeneous.
What are the advantages of conducting an experiment on undisturbed soil sample compared to disturbed soil sample?
A disturbed sample is one in which the structure of the soil has been changed sufficiently that tests of structural properties of the soil will not be representative of in-situ conditions, and only properties of the soil grains (e.g., grain size distribution, Atterberg limits, and possibly the water content) can be accurately determined. An undisturbed sample is one where the condition of the soil in the sample is close enough to the conditions of the soil in-situ to allow tests of structural properties of the soil to be used to approximate the properties of the soil in-situ.
How can porosity be measured?
Porosity is measured by taking a sample of the soil. The sample is then tested to measure the speed of water passing through the soil.
What is the best speed to separate a soil sample in a centrifuge?
Very high speed is the best speed to separate a soil sample in a centrifuge.
How do you neutralize soil after fertilized?
To neutralise a sample of soil, you must determine the pH of the soil sample either acidic or alkaline. Add lime (e.g. Limestone) to acidic soil to neutralise it. And add sulphur to alkaline soil which will neutralise it.
What is the general appearance of the soil sample?
Brown.
How can iron filings be separated from the soil sample?
Iron is magnetic so move a magnet through your soil sample to remove all the iron fillings.
The amount of each kind of soil particle in a sample determines the blank of the soil?
Dirt
In which type of soil would you expect to see most bubbles when water is mixed with the soil sample?
clay soil
Why do you do a soil sample and analysis?
To check the acidity of the soil and to see at wat level the soil will be able to support life
A soil sample contains living and nonliving materialswhich material was once living?
A soil sample contains living and nonliving materials. Which material was once living?
What substance found in a soil sample collected in an arid region would most likely be absent in a soil sample collected in a humid region?
rock salt
