What is the specialized organelle that stores calcium in a skeletal muscle cell called?
Golgi complex
Rough ER
Sarcomere
Sarcoplasmic reticulum
D. Sarcoplasmic reticulum
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Soldiers or refuges in crowded unsanitary conditions are MOST susceptible to which rickettsial disease?
A) Lyme disease B) typhus C) Q fever D) Rocky Mountain spotted fever
Which of the following factors does not interfere with the interpretation of evolutionary time using the molecular clock?
A) Horizontal gene transfer B) Differences in generation time C) Mutations due to background cosmic radiation D) Different selection pressures on different taxonomic groups E) Differences in DNA repair efficiency in different taxonomic groups
What do all of these diseases -- amoebic encephalitis, rabies, Creutzfeld-Jacob disease -- have in common?
A. They are all caused by protozoans. B. They are all transmitted through animal bites. C. Mortaility rates are all extremely high. D. There is a genetic component to all of these diseases, in addition to the infectious agent.
Microvilli
A. provide increased surface area for the exchange of materials. B. provide support for the cell. C. provide channels for the transport of materials within the cell. D. greatly increase the cell's volume.