You notice a sign in a public restroom that states "Sanitized for your safety." This means
A) sterilizing chemicals have been used in cleaning.
B) antiseptics have been used to clean the area.
C) degerming methods only have been used to clean the restroom.
D) methods of disinfection that meet minimum standards of microbial removal have been used.
E) only "organic" chemicals were used in the cleaning process to reduce microbial numbers.
D
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Before Mendel began his pea plant experiments he wondered if traits in offspring result from blending of parental traits or it they are inherited as ____________________ units
Fill in the blank(s) with correct word
Which of the following would be a modern example
of Lamarckianism? a. A strain of houseflies resistant to insecticides emerges. b. Squirrels separated by a river are found to be unable to interbreed. c. A son is born with a portion of his right index finger missing—the same portion that was severed from his father’s hand in an accident. d. A strain of houseflies resistant to insecticides emerges, and squirrels separated by a river are found to be unable to interbreed. e. A strain of houseflies resistant to insecticides emerges; squirrels separated by a river are found to be unable to interbreed, and a son is born with a portion of his right index finger missing—the same portion that was cut off from his father’s hand in an accident.
Bacteriophages may reproduce using a __________
pathway in which viral DNA becomes part of the host chromosome. Fill in the blank(s) with the appropriate word(s).
Figure on p. 737
Use the figure above showing the process of gastrulation to answer the following question.
The letter "C" in the accompanying figure represents ____.
A. ectoderm B. endoderm C. mesoderm D. neural plate E. yolk