Approximately _____ percent of the Earth’s water is salt water
a. 3
b. 50
c. 65
d. 98
D
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Tetrodotoxin is a potent poison, produced by some newts, pufferfish, and blue-ringed octopus that affects sodium transport involved with the voltage gates in neurons. A friend swimming in the Caribbean is pricked by a pufferfish and gets very sick. The most likely action the poison takes is
A. Mimicking a symporter and allowing sodium to rush out and potassium to rush in. B. Mimicking an antiporter and allowing sodium to rush out. C. Blocking an antiporter so sodium cannot rush in. D. Blocking a symporter and keeping sodium from rushing in.
Describe the general processes that occur in a sludge digester. What is an advantage of sludge digestion over activated sludge?
What will be an ideal response?
This class of antibodies is responsible for many allergies and may help protect against parasitic worm infections.
A. IgG B. IgC C. IgE D. IgD
An infectious disease researcher isolates the pathogen responsible for an emerging disease. The microbe is grown in the lab. A preparation of the laboratory-grown microbe is treated with a lethal dose of ionizing radiation and then tested for its potential as a vaccine. What type of vaccine is this?
A. attenuated B. subunit C. combination D. toxoid E. inactivated whole