A number of populations of different species interacting with one another in a natural environment, such as a rotten log, is called
Select one:
a. competition.
b. a community.
c. a biome.
d. predation.
e. symbiosis.
b. a community.
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A common consequence of nutrient deficiencies in plants is chlorosis, which is
a. wilting due to a lack of chlorine in leaves. b. death of the growing tips. c. premature loss of leaves. d. bursting of cells from excess water uptake due to an inability to clear chlorine from them. e. yellowing of plant tissues due to a lack of chlorophyll.
Which of the following was used to determine that a single specific strain of anthrax was sent through the U.S. Postal Service on the East Coast in the year 2001?
a. Metagenomics b. Mitochondrial genomics c. Microbial genomics d. Pharmacogenomics
Endospores survive a variety of harsh conditions in part because of the presence of
A) mycolic acid. B) lipopolysaccharide. C) hopanoids. D) dipicolinic acid. E) glycoproteins.
The chromic acid keeps turning dark after using only two or three times. This could most likely be corrected in the future by:
a) allowing more time in the xylene b) increasing the time in the alcohols c) checking the concentration of the chromic acid solution d) ensuring the complete removal of alcohol prior to chromic acid