Neonatal screening is done before the infant leaves the hospital. Blood is drawn through a heel stick and tested for several disorders that can cause lifelong disabilities. When is the ideal time to collect this specimen?

Describe how alleles and genes are related

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring