Antibodies, which stick to the surface of foreign invaders to slow their progress and attract other proteins that destroy them, are produced by _____

In opening her new private preschool, Mrs. Alvarez plans to

only accept students who come from upper-middle income families, because she read that students who perform well come from higher socioeconomic families. Mrs. Alvarez is making the _____ error of critical thinking. A) Occam's Razor B) extraordinary claims C) confirmation bias D) correlation vs. causation

In medieval times,

A) children dressed and acted like adults. B) clear awareness existed of children as vulnerable beings. C) children were viewed as tabula rasas. D) childhood was not regarded as a distinct developmental period.