An IS (insertion sequence) element contains
A) a transposase gene only.
B) a transposase gene and additional genes.
C) a transposase gene and inverted repeats at the ends.
D) a transposase gene, additional genes, and inverted repeats at the ends.
E) genes but not a transposase gene.
C
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Which vitamin functions in forming blood
clots? a. A b. E c. K d. B e. none of these
The portion of the bone labeled B in Figure 40-3 is called:
a. the periosteum.
b. the diaphysis.
c. the epiphysis.
d. compact bone.
e. metaphysis.
These are nonphotosynthetic plankton, including aquatic protozoa and tiny animals.
A. phytoplankton B. thermophiles C. zooplankton D. diatoms
What are the characteristics of two species with a distant evolutionary relationship?
A. Few similarities between their proteins B. Almost similar protein sequences C. Almost opposite protein sequences D. No similarities in their protein sequences. E. Missing amino acids in their sequences