Answer:
Toxicity can be measured by the effect the substance has on an organism, a tissue or a cell. We know that individuals will respond differently to the same dose of a substance because of a number of factors including their gender, age and body weight. Therefore a population-level measure of toxicity is often used
Explanation:
Tuberculosis vaccines are vaccinations intended for the prevention of tuberculosis. Immunotherapy as a defence against TB was first proposed in 1890 by Robert Koch. Today, the only effective tuberculosis vaccine in common use is bacilli Calmette-Guérin, first used on humans in 1921.
- Provide the family with lead education
- Consider treating the child with appropriate chelation therapy
- Refer the child to a clinical center specializing in lead poisoning
If the blood lead level<span> of a preschooler is found to be between 20 and 44 mcg/dL, the nurse should provide lead education to the family. The nurse should also consider treating the child with appropriate chelation therapy. The nurse may refer the child to a clinical center specializing in lead poisoning. The nurse should refer the child to social services if the child’s blood lead level is between 15 and 19 mcg/dL. The nurse should immediately provide diagnostic testing and initiate chelation therapy if the child’s blood lead level is 70 mcg/dL or greater.</span>
Genes B and C with 10% recombination frequency are closest to each other. Because recombination happens at random, the distance between genes that are farther from each other creates higher recombination frequency. A low recombination frequency of 10% means the genes are closest to each other. The short distance between the two genes allow fewer recombination to happen, thus the frequency is low.
