Which of the following best describes an estuary?
a. an intersection of a river and an ocean
b. the ocean region that is closest to land
c. the deepest part of an ocean
d. a very wide section of a river
a. an intersection of a river and an ocean
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During the third stage of aerobic respiration,
electrons and hydrogen ions released by the reactions of the first two stages are picked up by a. photosynthetic enzymes and ATP. b. CO2 and H2O c. iron and glucose. d. NAD+ and FAD. e. none of these.
Frequencies of inversions and/or allele frequencies often vary regularly when examined over a geographic area changing in either latitude or climate. This type of regular change is called a ________
A) zonality B) cline C) gradient D) biome
The life threatening body-wide response that can occur when allergens enter the circulatory system and cause a severe
drop in blood pressure is called ____________________. Fill in the blank(s) with the appropriate word(s).
Refer to Figure 40-5. The molecules required to bind at the sites labeled 1 and 2 for a cross bridge to
form are:a. Ca2+ and myosin. b. ADP and myosin. c. myosin and troponin. d. ATP and Ca2+. e. tropomyosin and O2.