What fertility technique extracts ova, combines them with sperm, and, after a few days, implants two or three blastocysts into the woman's uterus?

Thomas and Tony are both 7-year-olds who have been diagnosed with autism. Thomas enjoys talking obsessively about his favorite Disney movies, while Tony has only 10 recognizable words in his expressive vocabulary. This is an example of which classification concern?

a. co-occurrence b. comorbidity c. homogeneity d. heterogeneity

Why does the fovea provide the clearest, most detailed visual information? a. It is closest to the pupil

b. It surrounds the optic nerve. c. It has tightly packed receptors. d. It contains many blood vessels for supplying energy.