Joe has recently started having a great deal of difficulty falling asleep. In addition, he frequently wakes up during the night and has trouble falling back to sleep once awakened. At this point we can conclude that Joe's sleep problems are influenced by
a. medical conditions.
b. psychological concerns.
c. A genetic variant.
d. either medical or psychological conditions.
Question 2
As we grow older, it seems that the amount of sleep that we require
a. increases.
b. decreases.
c. stays the same.
d. decreases until early adulthood and then begins to increase again.
A magnificent sea anemone on the Great Barrier Reef, with an Ocellaris clownfish.
Chihuahua mix and purebred Great Dane
Great thinkers
A typical beginning technician tool set that includes the basic tools to get started.
Great Pyramids, Giza