In a given environment, moderately colored lizards are better able to hide from predators than light-colored or dark-colored lizards. over time, both light- and dark-colored lizards are selected, increasing the frequency of the moderately colored phenotype. this is an example of what type of selection?

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?

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.