An ecologist wants to know the size of a population of wild daisy plants growing in a meadow that measures 1,000 m2. The ecologist counts 30 daisy plants in a sample area of 100 m2. What is the estimated population of daisies in the entire meadow? EXPLAIN how you got to your answer by explaining your math.

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.