Which of the following has the lowest (most negative) water potential?

A) root cortical cells
B) root xylem
C) leaf air spaces
D) leaf cell walls


Answer: C

Biology & Microbiology

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Sensory information is transmitted to the CNS by the ____

a. efferent neurons of the autonomic nervous system b. afferent neurons of the peripheral nervous system

c. somatic neurons of the peripheral nervous system d. somatic neurons of the sympathetic division e. efferent neurons of the sympathetic division

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The main photosynthetic area of a leaf is composed

of a. mesophyll. b. cortex. c. xylem. d. epidermis. e. none of these.

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Which of the following diseases has been all but eliminated from the United States because of wastewater treatment plants?

A- West Nile virus B- malaria C- cholera D- lyme disease E- yellow fever

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