Evidence that all living cells have a common origin is best illustrated by the:a
basic similarities in cell structure and chemistry.
b. fact that all new cells come from previously existing cells.
c. cell theory, which states that the cell is the basic unit of life.
d. fact that cells are the building blocks of the most complex plants.
e. idea that cells are the smallest units that can carry out all life activities
a
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Rapid inward diffusion of Na+ produces a dramatic change in membrane potential. What is this event called?
A. hyperpolarization B. excitatory postsynaptic potential C. saltatory conduction D. monosynaptic reflex E. depolarization
Which bone contains the foramen magnum?
a. maxillary b. parietal c. occipital d. vomer e. sphenoid
Which H+ ion has just passed through the inner mitochondrial membrane by diffusion?
A) hydrogen ion A B) hydrogen ion B C) hydrogen ion C D) hydrogen ion D E) hydrogen ion E
Which concept below was a commonality of early Greek theories?
a. divine creation b. spontaneous generation c. unitarianism d. inheritance of acquired characteristics e. All of the above