Answer:
LD50 (median lethal dose)
Explanation:
- Whenever one needs to quantify the virulence of a pathogen then this is done by using a set of laboratory animals.
- LD50 (median lethal dose) is an important indicator of virulence.
- LD50 is defined as the number of pathogens that are required to kill 50% of the total infected animals.
- For the calculation of LD50, the animals are infected with a known number of pathogens and then a graph is plotted for the percentage of animals killed against the concentration of the pathogen used for infection.<em> The point at which the graph indicates the death of 50% animals, the corresponding concentration of inoculation of a pathogen is taken as the LD50 of that particular pathogen. </em>
Effector B cells clear the resolution of infections/and the rest persist as the memory cells that Normally survive for years.
Answer:
The coding section
The noncoding section
Explanation:
A gene kind of can be a segment of DNA or RNA from a cell's or an organism's genome, it may take several forms and thus parameterizes a phenomenon, in general the structure of a protein.
From the definition above a gene, the coding section (extrons) and the noncoding section (introns) are portions of the gene.
You are observing the metaphase phase of mitosis
Mitosis is a process of cell reproduction in which a cell divides to produce two daughter cells that are genetically identical to the parent. Metaphase is the third phase of mitosis. During this phase, the two centrosomes pulls the chromosomes towards the opposite poles of the cell which causes the sister chromatids to line up neatly across the middle (equator) of the cell.
