If it were not for the nasal cavity,
A. food would go down the wrong tube.
B. people would not be able to speak.
C. oxygen would not be exchanged in the alveoli.
D. air would not be conducted to the lungs.
E. more debris would enter the lungs.
Answer: E
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A research laboratory is attempting to collect the content of human red blood cells. The type of solution researchers should use to cause blood cells to lyse (burst) would be
A. hyperosmotic. B. isosmotic. C. hypoosmotic. D. osmotic.
Target tissues often have receptors for multiple hormones. The response of the target tissue may depend on ____
a. blood levels of and coordinated activities of several hormones secreted by different glands, only b. blood levels of the hormones that affect it only c. coordinated activities of several hormones secreted by different glands only d. the effects of other signaling molecules, such as prostaglandins only e. blood levels of, coordinated activities of several hormones secreted by different glands, and the effects of other signaling molecules, such as prostaglandins
Which of the following is TRUE about the
spores of seed plants?
a. megaspores develop into female gametophytes b. meiosis produces four megaspores c. microspores enlarge to become megaspores d. megaspores are diploid cells e. microspores undergo meiosis to form four pollen grains
A major function of the Casparian strip of the endodermal cells of a root is to
(A) protect the meristem as the root tip grows through the abrasive soil particles (B) allow for expansion of the vascular cambium as the root grows laterally (C) control the movement of materials into the vascular cylinder of the root (D) initiate lateral root growth (E) serve as a site for the storage of excess sugars in the form of starch