Bacteria described as being coryneform have which of the following morphologic features?
a. Squared rods with squared ends arranged in pairs
b. Short gram-positive cocci in branching chains
c. Resemble and are often referred to as Chinese letters
d. Long branching gram-positive bacilli
C
Most of the genera in this chapter (except Listeria, Rothia, and Oerskovia) are classified as co-ryneform bacteria, that is, they are gram-positive and have short or slightly curved rods with rounded ends; some have rudimentary branching. Cells are arranged singly in "palisades" of pa-rallel cells or in pairs that remain connected after cell division to form V or L shapes. Groups of these morphologic characteristics observed together resemble, and are often referred to as, Chi-nese letters.
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Genetic drift is a random process that can change the genetic structure of a population Indicate whether the statement is true or false
You are working in a zoo, and unbeknownst to the zoo-keepers, a male lion sneaks into the pen of a female tiger, and months later, the female tigers gives birth to a liger. Lions and tigers do not co-exist in the wild, so ligers are not found naturally. This liger looks more like the father lion than the mother tiger because the lion genes tend to be more dominant, but it is larger than either the mother or the father. However, the liger is sterile, and so the only way to create more ligers is to continually breed male lions to female tigers. When the liger is presented to the scientific community, it is decided that the liger is not a new species. Upon which species concept is this decision based?
A. Biological species concept B. Morphospecies concepts C. Phylogenetic species concept D. Sympatric species concept
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A. flowering plants. B. gymnosperms. C. ferns. D. mosses.
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a) active uniport b) active antiport c) active symport d) passive symport e) passive antiport