Which group of bacteria is described as catalase positive and is gram-positive cocci that grow facultatively anaerobic and form grapelike clusters?
a. Neisseria
b. Rothia (stomatococci)
c. Staphylococcus
d. Micrococcus
C
All descriptions given are those of the Staphylococcus species.
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Which of the following types of selection favors the survival of individuals with the intermediate phenotype?
A. Disruptive selection B. Stabilizing selection C. Directional selection
Our species is called Homo sapiens. The first word refers to which taxonomical grouping?
A. Kingdom. B. Phylum. C. Order. D. Genus. E. Species.
The most likely total number of species on Earth is estimated to be between ________.
Fill in the blank(s) with the appropriate word(s).
In Southern blotting, DNA fragments on filters must be ____________________ so that probes can
bond with them. Fill in the blank(s) with the appropriate word(s).