Which of the following structures connects the placenta and allows materials to be carried to and from the developing organism?

A) teratogen
B) neural tube
C) amniotic fluid
D) umbilical cord

D) umbilical cord

Psychology

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What is the term for the person you think you should be?

a. desired self b. idol self c. ideal self d. ought self

Psychology

You can increase your efficiency by scheduling recreation, chores, and studying

a. around your personal circadian rhythms. b. by establishing a new circadian rhythm. c. according to one's median level on a homeostasis chart. d. according to your horoscope.

Psychology