Planes maintain an atmospheric pressure equivalent to about 8,000 feet to
a. maintain a stable temperature.
b. maintain oxygen levels.
c. maintain oxygen availability.
d. maintain oxygen levels and maintain oxygen availability.
e. maintain oxygen availability and reduce buildup of carbon dioxide.
C
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When a muscle fiber is relaxed, why can’t
myosin bind to actin?
a. ATP is not present b. the myosin binding site on actin is blocked c. the myosin head is in the wrong shape for binding d. the actin is in the wrong orientation for myosin binding e. the myosin head is 180 degrees from its attachment configuration
Members of the class Bivalvia:A
have gills that secrete the shell. B. have a mantle that may form pearls. C. are all sessile. D. all have a radula. E. have a broad foot used for locomotion.
Why does a sporophyte-dominant stage allow for greater diversity?
What will be an ideal response?
To dissect means primarily
(a) to cut open. (b) to remove all internal organs. (c) to expose to view. (d) all of the above.