Most simple invertebrates obtain their oxygen by diffusion directly from the surrounding
A. mud.
B. air.
C. water.
D. blood.
C. water.
Biology & Microbiology
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The botulism toxin ____
a. is an endotoxin b. is produced by an extremophile c. may be found as a contaminant in expired food d. is marketed as Botox e. causes muscles to contract
Biology & Microbiology
The structural genes in the lac operon are transcribed into a single polycistronic mRNA molecule
Indicate whether the statement is true or false
Biology & Microbiology
The sex of a human is determined by the:a
number of chromosomes. b. number of autosomes. c. presence of only one X chromosome. d. number of sex chromosomes. e. presence of a Y chromosome.
Biology & Microbiology
Once a culture is purified, the next logical step in the process of identifying bacteria is biochemical testing
Indicate whether the statement is true or false
Biology & Microbiology