Lack of iodine will lead to the development of
a. diabetes insipidus.
b. diabetes mellitus.
c. a simple goiter.
d. acromegaly.
e. Graves disease.
C
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Secondary syphilis is not contagious.
Answer the following statement(s) true (T) or false (F)
In humans, birth weight is an example of a characteristic affected by stabilizing selection. What does this mean to the long-term average birth weight of human babies? How might the increasing number of Caesarean sections be affecting this characteristic?
What will be an ideal response?
Refer to the accompanying photograph. Which statement best explains why the owl has its head almost upside down?
a. Photoreceptors are concentrated near the bottom of the eye. b. Photoreceptors are concentrated near the top of the eye. c. Loud music from a passing car has caused damage to the sense of balance. d. An obstruction in its ear has caused this instinctual behavior. e. The presence of prey above has caused this physical alert.
Which of the following human extraembryonic
membranes is the first site of blood cell formation and the source of germ cells? a. amnion b. yolk sac c. chorion d. allantois e. none of these