Question 2 To investigate a possible relationship between two factors, such as acidity and solubility, you must first

identify the variables involved in the experiment. Identify the independent variable, the dependent variable,

and any possible confounding variables within this experiment.

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.

Which of the following organisms are capable of self-fertilization? a.plants b.tigers c.humans

Light sensitivity in euglena is provided by the