Which components of a sphingolipid are collectively known as a ceramide?
A) the fatty acid and phosphate
B) the fatty acid and sphingosine
C) phosphate and choline
D) phosphate and sphingosine
B
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The breakup of Pangaea and the formation of the Atlantic and Indian Oceans were responsible
for the shrinking of the Pacific Ocean. Indicate whether the statement is true or false.
Heat waves are generally considered to be little more than a nuisance and are not responsible for
considerable loss of life. Indicate whether the statement is true or false.
Calm, tranquil weather is sometimes extremely hazardous. Indicate whether the statement is true or false
Despite its high temperatures, why would the thermosphere feel cold to humans?
A) The number of molecules is not high enough to transfer heat to human's skin. B) Humans would die due to pressure changes before they could experience the intense heat. C) The atmosphere is denser in the thermosphere and this pressure reduces heat transfer. D) The average kinetic energy is actually less in the thermosphere than the troposphere.