All of the following are correct about the autoclave, except
A) Sterilization is achieved when steam condenses against the objects in the chamber and raises their temperatures.
B) It is the temperature that kills the microbes, not the pressure by itself.
C) It is important not to overload the chamber.
D) It is effective for sterilizing powders, oils, and waxy substances.
E) The duration of the process depends on how full the chamber is.
D) It is effective for sterilizing powders, oils, and waxy substances.
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The lowest temperature needed to kill or inactivate all microbes in 10 minutes is the
A. thermal death time (TDT). B. death phase point. C. thermal death point (TDP). D. sporicidal time.
Consider a tadpole becoming a toad. You would expect to find it changing its form of nitrogenous waste from
A. ammonia to urea. B. urea to ammonia. C. uric acid to urea. D. urea to uric acid. E. uric acid to ammonia.
Which phylum consists of diploblastic animals with radial or biradial symmetry?
a. Cnidaria b. Parazoa c. Platyhelminthes d. Mollusca
Two bacterial strains have the same genes for metabolizing a carbohydrate, but one is wild-type for a regulatory inducer while the other does not produce the inducer. Which of the following statements is CORRECT with regard to the metabolism of the
bacteria? A) The two bacterial strains have the same phenotype. B) The two bacterial strains have different phenotypes. C) The genotypes and phenotypes of the two bacterial strains are the same. D) The two bacterial strains have the same phenotype but have different genotypes. E) The answer cannot be determined from the information provided.