Estuaries only exist in lakes
Indicate whether the statement is true or false
F
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Assuming that all other factors are equal, on a cold winter afternoon the amount of dissolved O2 in a lake will be
A) more than on a hot day because the decreased energy in colder water makes O2 molecules less likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day. B) less than on a hot day because the decreased energy in colder water makes O2 molecules more likely to escape to the atmosphere, and biological oxygen demand will be higher than on a hot day. C) more than on a hot day because the decreased energy in colder water makes O2 molecules less likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day. D) less than on a hot day because the decreased energy in colder water makes O2 molecules more likely to escape to the atmosphere, and biological oxygen demand will be lower than on a hot day.
Comparing ethnicity and race reveals
A) they are very similar concepts. B) ethnicity is part of a person's cultural identity but race is not. C) race is a better indicator of what someone is like than ethnicity. D) it is possible not to have an ethnicity but everyone belongs to a race. E) both are biologically determined but only race involves skin color.
In 1926, there were ________ if levees averaging 6 m (20 ft) along the Mississippi River.
A. 2900 km B. 1500 km C. 290 km D. 190 km
The main dune form in most deserts is called a(n) ________
A) barchan B) bajada C) self D) transverse E) alluvial