Which taxon has been assigned to a number of ”supergroups”?
a. Class Carnivora.
b. Order Carnivora.
c. Phylum Protists
d. Class Chordata.
e. Order Mammalia
C
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Multiple functional groups are able to attach to macromolecules. What is the most useful characteristic that enables the attachment of multiple functional groups?
A. One hydrogen ionic bond. B. Four carbon covalent bonds. C. Two oxygen covalent bonds. D. Three nitrogen ionic bonds.
In which type of microscopy is a beam of electrons used to scan the specimen, followed by the conversion of the
excited electrons to a three-dimensional image?
a. confocal laser scanning microscopyb. phase-contrast microscopy c. bright field microscopy d. scanning electron microscopy e. fluorescence microscopy
Which of the following is the smallest?
A) Eukaryotic cell B) Mitochondrion C) Prokaryotic cell D) Virus
________ bacteria contain an F factor or plasmid that is capable of initiating conjugation. ________ bacteria contain an F plasmid that possesses a portion of the bacterial chromosome
A) F+; Merozygotes B) Merozygotes; F? C) F?; F+ D) F?; Hfr E) F+; Hfr