Meta-analysis combines data from a number of related studies instead of assessing each study's results separately

Gwen and her husband are thrilled as they peer into Gwen's uterus by means of an ultrasound

The physician reports that the pregnancy appears normal, and that their baby's fingers, toes, heart, and circulatory system are developing as expected. The couple learns that the baby is just under an inch long. Given this information, the current stage of prenatal development is the: a) embryonic period. b) germinal period. c) zygotic period. d) fetal stage.

A cation would be attracted to

a. another cation. b. an anion. c. a sodium ion. d. a potassium ion. e. a calcium ion.