Which of the following contributed to the successful application of Koch's postulates?
A. The development of the compound microscope.
B. The theory of abiogenesis.
C. The ability to record the appearance of bacteria photographically.
D. The development of simple bacterial staining techniques.
E. The development of techniques for sterile transfer of bacteria.
Answer: E
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The mRNA that would most likely have the longest half-life would:
A. containan exon junction complex bound downstream of a stop codon. B. lack a stop codon. C. containan AU-rich element in the 3'-UTR. D. containone or more hairpin structures.
Which one of the following correctly describes the direction of translation?
A. DNA is read 3'-to-5' and RNA is synthesized 5'-to-3'. B. DNA is read 3'-to-5' and RNA is synthesized 3'-to-5'. C. DNA is read 5'-to-3' and RNA is synthesized 3'-to-5'. D. DNA is read 5'-to-3' and RNA is synthesized 5'-to-3'. E. The direction varies in different genes.
If the pattern remains the same, in 50 years the population in Figure 53-6 would:
a. be experiencing slow growth.
b. be experiencing rapid growth.
c. be experiencing steady state growth.
d. be experiencing negative growth.
e. No prediction could be made using these data.
The original source of variation within a population comes from ________
Fill in the blank(s) with correct word