This apparatus was used in the primitive Earth
atmosphere simulation experiments performed by
a. Stanley Miller.
b. Thomas Brock.
c. Australian researchers.
d. Jeon Kwang.
e. Lynn Margulis.
Answer: a
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Sterilization involves ________ all viable microorganisms.
A. removing B. killing OR removing C. metabolically inactivating D. killing
How do cells "interact" with the extracellular matrix?
A. through cadherins B. through integrins C. through gap junctions D. through tight junctions
Recombination frequency for two genes is a function of
a. the distance between the two genes on a single chromosome. b. the overall size of the chromosome where the genes are located. c. the distance between the two chromosomes that each have one of the two genes. d. the relative sizes of the two chromosomes that each have one of the two genes. e. the sex of the parent that supplies each gene.
The protozoan that causes malaria is an intracellular parasite of red blood cells (RBCs). An adaptive immune response to this parasite is problematic because
A) red blood cells do not produce MHC and, therefore, do not display the fact that they have been infected by presenting antigen. B) the parasite damages leukocytes along with RBCs. C) RBCs normally produce cytokines necessary for adaptive immune response, which this infection prevents. D) complement cannot effectively destroy RBCs. E) RBCs never enter lymphoid tissue.