pH is
a. a measure of phosphorous concentration.
b. a measure of hydrogen ion concentration.
c. measured by counting the number of different kinds of aquatic insects.
d. measured on a scale from 1 to 100
a
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Gas exchange occurs where?
a. trachea b. pharynx c. alveoli d. bronchi
The figure is a __________ microscope
photomicrograph. a. standard light b. phase contrast c. Nomarski process light d. transmission electron e. scanning electron
The peripheral nervous system consists of the brain and spinal cord
Indicate whether the statement is true or false
During development, many genes act in such a way as to decrease the number of alternative developmental pathways that a cell can follow. Usually there are two alternative developmental paths for a cell to follow. What is the term given to genes that act
in this fashion? What will be an ideal response?