The period of the embryo goes from __________ weeks after conception

Which is the least likely pairing in an incestuous relationship?

(a) uncle, niece (b) father, daughter (c) adults who are not related but who had been reared together in a kibbutz (d) all are equally likely

Xiao is gathering research on the number of meals people eat. He gathers data about the number of daily meals eaten by 25 people at each of the following ages – 10, 20, 30, 40, 50, 60, and 70 years – over the course of one week,

and looks for developmental differences. What type of research design is Xiao using? a. Continuous b. Sequential c. Cross-sectional d. Longitudinal