Which of the following resulted in mercury contamination and over 1780 deaths due to Minamata disease in Japan?
A) Producing acetaldehyde
B) Burning of coal
C) Disposal of mercury batteries
D) Leaching from rocks
E) Volcanic eruptions
Question 2
Most active swimming fish use pelvic fins and pectoral fins ________.
A) for swim propulsion
B) primarily as stabilizers
C) to hold onto prey
D) to increase the surface area
E) to turn, brake, and balance