The ____________________ is a mass of tissue that permits the embryo (and, later on, the fetus) to exchange nutrients and wastes with the mother
Fill in the blank(s) with correct word
placenta
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If a researcher watches one-week-old babies and records how many times they open and close their eyes while lying in their cribs, he is most likely using:
the case-study method. a controlled experiment. cross-sectional research. scientific observation.
_____ is the intensity of light energy perceived as a color, which is based on the amplitude of the light wave
a) Hue b) Trichromaticity c) Saturation d) Brightness
Researchers have described four categories of social status. Which children were "liked" by some children but "disliked" by others?
a. popular b. rejected c. neglected d. controversial
The type of sensation you experience depends on which area of the brain is activated. This is known as
a. transduction. b. sensory localization. c. sensory adaptation. d. cerebralization.