How do genes, chromosomes and DNA all relate to each other?

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

Achildren’s pain relief elixir contains 80. mg acetaminophen per 0.50 teaspoon. the dosage recommended for a child who weighs between 24 and 35 lb is 1.5 teaspoons. what is the range of acetaminophen doses, expressed in mg acetaminophen/kg body weight, for children who weigh between 24 and 35 lb