Persistent pollutants that accumulate in living tissue will be most concentrated in the bodies of
A. producers.
B. decomposers.
C. carnivores.
D. herbivores.
C. carnivores.
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The gene for human insulin has been successfully cloned in
A. S. aureus. B. E. coli. C. rhinovirus.
Frederick Griffith was a microbiologist who observed that
A) DNA contains nitrogen and phosphorus. B) proteases disrupt transformation from nonvirulence to virulence. C) DNA from heat-killed viruses transforms virulent viruses. D) nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria.
The woman scientist who made a major contribution to the discovery of the structure of DNA was
_____________________. Fill in the blank(s) with the appropriate word(s).
For most protostomes, what is the developmental origin of the body cavity between the gut and muscles of the body wall?
a. schizocoelom b. enterocoelom c. mesoglea d. blastopore