An example of a fat-soluble vitamin is ____
a. vitamin C
b. thiamin
c. riboflavin
d. vitamin K
e. folic acid
ANSWER: d
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Which of the following processes is responsible for the changes scientists observed in atmospheric concentrations of 12C, 13C and 14C?
A. the burning of fossil fuels B. volcanism C. the clearing of forests D. chemical weathering E. subduction
There are three tRNAs with anticodons complementary to stop codons Indicate whether the statement is true or false
__________ are soils that have roughly equal proportions of sand, silt, and clay.
Fill in the blank(s) with the appropriate word(s).
The figure shows the number of Hox gene clusters in different groups of animals. Which of the following is true for the number of clusters in each group?
a. land vertebrates > all fish > tunicates b. all fish > lancelets > tunicates c. higher ray finned fished >cephalochordate > land vertebrates d. all fish > cephalochordates > land vertebrates