Which of the following particles has no charge?
a. ions
b. electrons
c. bonds
d. protons
e. neutrons
Ans: e. neutrons
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Which protein can be produced by a virus-infected cell, in order to communicate with other cells that need to produce antiviral proteins?
A. Albumin B. Histamine C. Interferon D. Lysozyme E. Complement
A unidirectional process where a specific compound released by one organism has a negative effect on another organism is called
A. commensalism. B. negative cooperation. C. predation. D. amensalism.
Select one of the options below and compare and contrast the paired terms:A
primary and secondary immune response B. passive and active immunity C. artificial and natural immunity What will be an ideal response?
According to the text, ________ is the region with largest percentage of internet users.
A. Africa B. Asia C. North America D. Europe