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Pollenkitt - Pollen Wall
The lipoidal layer found on the outside of the mature pollen grains of many insect pollinated species is known as the pollenkitt. In addition to lipids it is made up of flavonoids, carotenoids and degeneration products of tapetal proteins. The carotenoids are responsible for its characteristic yellow or orange color. The function of pollenkitt is not clear. It is believed to act as an insect attractant, help in pollen dispersal and in protecting against the damaging effects of UV rays. Deposition o flavonoids appear important for the nod functioning of pollen. In maize it has been shown that the pollen grains that lack flavonoids are incapable of developing tubes that are effective in fertilization. Lipids also help in checking water loss after anther dehiscence and discharge of pollen.
Industrial Effluents - Causes of Water Pollution Most industrial operations produce effluents that are discharged into nearby river or any other water body. The industrial eff
ASPIRIN - It is acetylsalicyclic acid (C 6 H 4 (OCOCH) 3 CH 3 ). It changes in salicyclic acid in body. It is analgesic, antipyratic (fever reducing), anti inflamma
Write up your own Matlab program to do the job described by Show">http://www.avatar.se/molbioinfo2001/dynprog/adv_dynamic.html Show a few examples, your code does work. You wil
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Why in some cases is mitosis a synonym of reproduction? In some living beings asexual reproduction happens by many means: binary division, schizogony, budding, grafting, etc. I
Explain about the Biuret Method? The Biuret reaction was one of first colorimetric assays developed for protein estimation. It is most often used in applications requiring a fa
Define the Fehling's Soxhlet method (Lane-Eynon method)? This is a titrimetric method that is commonly used in food laboratories to estimate percentage of reducing sugars and t
What structure does the sheath replace in a dicot?
Fatty acid breakdown brings about the oxidation of long-chain fatty acids. The fatty acids are first transformed to their acyl CoA (coenzyme A) derivatives and then degraded by the
what is the kingdom,phylum,class,age of gastropoda
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