Species are the basic taxonomic unit; it is assigned to a genus. In eukaryotes, the species are the group of similar organisms which reproduce. Bacterial species identified as a group of organisms having similar phenotypic properties.
Determine evolutionary tree on the number of genus
B.
Determine numbers of phylogenetic tree
C.
Determine phylogenetic relationships
D.
Determine phenetic relationships among organisms
Answer: Option D
Explanation:
Numerical taxonomy was given by Sokal and Sneath. It determines the relationships among organisms on the basis of their phenetic system. It is summarized with a tree diagram called dendrogram.
Which of the following is not used to determine DNA relatedness in the phylogenetic system?
A.
Thermal stability of related DNA
B.
Genome size
C.
GC content
D.
Amino acid sequences
Answer: Option D
Explanation:
DNA relatedness can be determined by following five factors: GC content, genome size, the thermal stability of related DNA sequences, DNA relatedness when the condition is optimal for DNA reassociation, and DNA relatedness when the condition is superoptimal for DNA reassociation.
The collective study of genotypic, chemotaxonomic, and phenotypic method is?
A.
Polyphasic approach
B.
Numerical taxonomy
C.
Bacterial taxonomy
D.
Phylogenetic approach
Answer: Option A
Explanation:
Polyphasic approach is a grouping of organisms on the basis of the physiological, morphological, and biochemical feature. It is a most popular approach currently for classifying bacteria.
Coxiella brunetii is gram-negative, non-motile, and obligate intracellular parasites which belong to the class of rickettsias. These organisms grow and reproduce within a host cell.
