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Answer:
The correct answer is 2.) 1 , 2
Mitosis is a type of cell division in which single parent cell divides into two daughter cells with equal number of chromosomes as in the parent cell.
It occurs in somatic cells of the body for growth and repair of the tissue.
It maintains the chromosomal number between parent and daughter cells and it is the reason that it is also called as equational division.
Answer:
a. the virus must be able to cross-link red blood cells directly.
Explanation:
Viral hemagglutination assay is a method which is used for the quantification of the relative concentration of the viruses.
The principle on which the hemagglutination assay works is as follows:
- There are sialic acid receptors present on the surface of the red blood cells which will bind to the haemagglutinin glycoprotein present on the surface of the viral particle.
- Due to the binding of the sialic acid receptors with haemagglutinin particle there will be cross-linking of the red blood cells by the viral particles and a lattice formation will take place.
- The lattice will remain suspended in the solution however if the concentration of the virus particles will be less, the lattice will settle down in the well.
Thus, this method allows knowing the relative concentration of the virus.
<em>Due to its basic principle of cross-linking this method works well for only a few viruses such as influenza virus. </em>
Explanation:
Iodophor -
Iodophor is a complex of iodine , with solubilizing agents , such as the povidone , surfactant .
And forms a water - soluble material which can release free iodine in the solution phase .
Dilute form of iodophor is used by winemakers and brewers to sanitize their equipment and bottles .
The major advantage of iodophor over other is that , it increases the stability of iodine .
Answer
CORRECT ANSWER ► B
B- A periodic warming sea surface temperatures
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