The disinfectant screening method that is known as the ________ test, which is used to measure the potency of a disinfectant.
Fill in the blank(s) with the appropriate word(s).
phenol coefficient
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Which of the following statements is a valid conclusion of this experiment?
A) Balanus can survive only in the lower intertidal zone because it is unable to resist desiccation. B) Balanus is inferior to Chthamalus in competing for space on rocks lower in the intertidal zone. C) The two species of barnacles do not compete with each other because they feed at different times of day. D) The removal of Balanus shows that the realized niche of Chthamalus is smaller than its fundamental niche. E) These two species of barnacle do not show competitive exclusion. F) If Chthamalus were removed, Balanus's fundamental niche would become larger.
Which of the following structural components
is NOT a part of a bacteriophage?
a. protein coat b. DNA c. viral envelope d. all of these ARE parts of a bacteriophage e. more than one of these is NOT a part of a bacteriophage
The accumulation of free oxygen in the atmosphere ____
a. was a result of the accumulation of a byproduct of a type of photosynthesis b. caused the further spontaneous generation of life c. provided the opportunity to extract more energy through anaerobic respiration d. occurred immediately after the earth was formed e. allowed for DNA to replace RNA as the primary data storage molecule
In a pedigree chart, a male showing the specific trait
being studied is indicated by a a. darkened square. b. clear square. c. darkened diamond. d. clear triangle. e. darkened circle.