4. Why is it important for a scientist to think about their sample size if they are going to extrapolate their data? (Hint: Think about predicting the rainfall this coming March based on only last year, as compared to predicting it
based on the past 30 years.) How might a scientist determine if they have enough samples?

The response is the basis for vaccination. primary secondary tertiary none of the above

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

All phases of matter may have a fixed mass