Exam 19: Microbial Taxonomy and the Evolution of Diversity

Conjugation is useful for determining relatedness between bacteria at the species level because it never occurs between organisms of different genera.

The science dealing with classification is called ______.

Which of the following is an example of the use of the binomial system devised by Linnaeus?

Although there are other classification schemes for prokaryotes,the one used in Bergey's Manual is currently considered by most microbiologists to be the most accurate.

Conserved indels are

In an approach called __________ taxonomy,relatedness is determined by a wide range of phenotypic and genotypic information.

One hypothesis explaining the first nucleated eukaryotic cell is based upon the fusion of an archaeon and a bacterium that,over time,saw archaeal genes involved in metabolism being lost while bacterial genes involved in information processing were also degraded.

Phylogenetic trees show inferred evolutionary relationships in the form of multiple branching lineages connected by nodes.

On a phylogenetic tree,each node (branchpoint)represents a divergence event,and the length of the branches represents the number of molecular changes that have taken place between the nodes.

Extensive horizontal gene transfer between domains greatly simplifies the construction of phylogenetic trees.

The temperature at which half of the strands of a double-stranded DNA molecule have separated from each other is called the __________ temperature.

The type strain is the most representative strain of a particular species.

Bacterial strains that have distinct antigenic properties are called __________.

The scientific study of organisms with the ultimate goal of characterizing and arranging them in an orderly manner is ______.

According to genome analysis,a member of the genus _________ is most closely related to the mitochondrion.

Small,random genetic changes that occur over generations is known as ______.

Microorganisms do not generally reproduce sexually; therefore,species are usually defined by phenotypic and genotypic similarities.

A theoretical concept that is used to understand how and why certain organisms can be sorted into discrete taxonomic groups is known as the _______.

Which of the following is not true about the G + C content percentages in DNA of organisms?

A classification system based on evolutionary relationships is called a __________ system.