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Critical thinking
Vaccines and Immunity
The immune system is a vitally important system for the human body. When the immune system under or over-reacts major homeostatic imbalances can be detected. Chapter 9 highlighted the immune system and some of the major components to this system. Discuss the importance of antibodies and how antibodies relate to immunity. In addition, how do vaccines activate the immune system and how do vaccines relate to active immunity?
What are the advantages of using each major group of characteristics (morphological, physiological and metabolic, biochemical, ecological, genetic, and molecular) in classification and identification? How is each group related to the nature and ex..
the plasma membrane is afluid mosaic, the changes in surface areato volume ratio due to a cell's growth are critical acell's ability to move materialacross the plasma membrane
phenylalanine medium sometimes is prepared in broth form with a pH indicator simiar to that used in decarboxylase medium so that increases in pH then can be detected by development of purple color. when testing an organism for the ability to deami..
A population of Anopheles mosquitoes reaches very high densities, and is subjected to aerial spraying by DDT. The following six years, the mosquitoes are not observed at all, but the population was sprayed “just in case”. An outbreak occurs sevem ..
The developing embryo inside the seed is NOT capable of doing photosynthesis until it reaches the seedling stage when its first green stem and leaves emerge from the ground). So, how does the embryo inside the seed get enough energy to grow and de..
Where does RNA polymerase begin transcribing a gene into mRNA?
Recall that DNA is made from a sequence of four nucleotides that differ in terms of which nitrogen base A,T,G,C is present in each nucleotide. Suppose you have a region of DNA which is 100 nucleotides long. How many possible nucleotide sequences are ..
What are the possible gametes produced by the individual SsYy
Both endocrine and nervous systems are major regulating system of the body; though, nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. In brief explain this comparison.
What are the pros and cons for using liquid-liquid extraction? What are the pros and cons for using SPE?
How do our genes affect our suscebtibility to disease? Exactly what happens in the aging process that makes us more susceptible to disease? Are certain cultures more susceptile to particular diseases?
Using a spectrophotometer set at 400 nm, an absorbance reading of 0.050 was obtained for a solution of p-nitrophenol at pH 6.5. The molar extinction coefficient of p-nitrophenol 21500 M-1cm-1 and the pka for p-nitrophenol is 7.
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