The first cells appeared about ________ billion years ago.
A) 5.2
B) 4.6
C) 3.8
D) 2.9
E) 1.5
Correct Answer:
Verified
Q6: Disease-causing microorganisms are called
A)decomposers.
B)prokaryotes.
C)pathogens.
D)eukaryotes.
E)fermenters.
Q9: The microorganisms that recycle nutrients by breaking
Q11: Koch's postulates are criteria used to establish
Q11: Cells,like bacteria and archaea,that do not have
Q12: Which of the following is not considered
Q13: When humans manipulate the genes of microorganisms
Q16: Which activity is an example of biotechnology?
A)Bacteria
Q17: The most prevalent worldwide infectious diseases are
Q18: Sterility refers to
A)being pathogen free.
B)having an absence
Q20: Which group of microorganisms is composed only
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