What type of immunity results from transfer of antibodies from one individual to a susceptible individual by means of injection?
A) innate immunity
B) naturally acquired active immunity
C) naturally acquired passive immunity
D) artificially acquired active immunity
E) artificially acquired passive immunity
E
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________ are glycoprotein spikes protruding from the outer surface of the viral envelope.
Fill in the blank(s) with the appropriate word(s).
Occasionally, chromosomes fail to separate during meiosis, leading to daughter cells that have an abnormal number of chromosomes. This phenomenon is called
A. epistasis. B. nondisjunction. C. crossing over. D. pleiotropy. E. chromosome inactivation.
A plate of solid growth medium with colonies on it is pressed gently onto sterile velveteen. The
velveteen "stamp" is used to make identical plates. This technique is called:
a. replication. b. replica plating. c. plating. d. plate making. e. horizontal gene transfer
Enzymatic competition results when
A. several substrates can combine with one enzyme. B. one enzyme can bring about the formation of several substrates. C. several types of enzymes can combine with a given substrate. D. one enzyme can produce several types of products.