The pitch of a sound
a. is determined by the frequency of vibrations of air molecules
b. depends on the amplitude of the waves
c. is measured in units called decibels
d. determines a sound's loudness
e. is characterized by all of the above
A
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Which of the following statements concerning development is false?
A) The term induction refers to the chemical interplay between developing cells. B) The developing oocyte receives molecules that affect development from the surrounding granulosa cells. C) Each blastomere in the blastocyst receives exactly the same cytoplasmic composition. D) Differences in a cell's cytoplasmic makeup affect the cell's genetic activity. E) Cells release molecules that affect the developmental process of neighboring cells.
a simple goiter usually affects men
a. true b. false
Where are B lymphocytes believed to mature in adult humans?
A) Bursa of Fabricus B) bone marrow C) compact bone D) liver
Which cells are the first to arrive at the site of inflammation?
a. Lymphocytes b. Macrophages c. Monocytes d. Neutrophils