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It we use upper epidermis, rather than the lower epidermis, what will be the conclusion and why?
It will reduce a plant transpiration. Upper epidermis is a flattened layer of cell that forms the surface of the leaf and makes the cuticle. Lower epidermis: bottom surface layer...
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In media preparation, the culture media needs to be adjusted to ± pH 5.8. Give reasons why it is so and what would happen if the pH is lower than 5 or more than 6.5?
Apart from complete nutritional composition, right and stable pH is another important requirement for optimum microbial growth in culture media. The pH of a culture medium should be suitable to...
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Explain why the genetic code would not work if nucleotide bases were arranged in pairs rather than in triplets, to make the coding units.
The reading of code in pairs of nucleotides is insufficient since only 16 different combinations (4²) of the four nitrogenous bases can be made. Given that there are 20 amino...
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What information about the Devonian tetrapods leads to the conclusion that tetrapods evolved in the water rather than on land?
The common ancestor of tetrapods vertebrate had fins (with lepidotrichia), scales, gills, and lived in the water.They also had air bladders (air-filled sacs) connected to the back of their throats that...
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Why does an endotherm’s metabolic rate increase above the upper lethal temperature? And why does the metabolic rate fall below the lower lethal temperature?
Above the upper lethal temperature, an endotherm’s metabolic rate increases to expend energy that will be used to lose heat. As a result, increased metabolic rate causes sweating that stimulates...
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why does the headlines usually use the word magnitude rather than intensity of an earthquake?
The Mercalli Scale is based on observable earthquake damage. From a scientific standpoint, the magnitude scale is based on seismic records while the Mercalli is based on observable data which can be subjective. Thus, the magnitude scale is considered scientifically more objective and therefore more accurate.An intensity scale measures that...
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<pre class="editor-code"><code class="prism">Do you expect the pH of the methylamine solution to be higher than or lower than that of the potassium hydroxide solution? why? </code></pre>
No since Potassium Hydroxide solution is a strong base while methylamine solution is a weak base.
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I was told that it is better to use an amphiphilic detergent such as Pluronic f68 rather than mix a hydrophilic one with a hydrophobic one. Why is this the case?
The most valuable in practical terms due to their surfactant properties diphilic - the presence of the hydrophilic and hydrophobic parts. The dual nature of the surfactant molecules promotes spontaneous...
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What is critical solution temperature? Describe liquid pairs which have
(i) upper CST,
(ii) lower CST, and
(ii) both upper and lower CST.
Critical solution temperature is the temperature at which completemiscibility is reached. (i) Above the upper CST two liquids are miscible in all proportions. (ii) Below the lower CST two liquids...
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What is CST of a partially miscible liquid pair ? give one example each for the following liquid pairs which have
(a) lower CST
(b) upper CST
(c) both lower and upper CST
Partially miscible liquids necomemore soluble with the increase in temperature and at a certain temperature they become completely miscible.This temperature is known as the critical solution temperature (CST).liquid pairs which have(a) lower CST-triethylamine...
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