Q1ITD - Campbell Biology

Question

First, make sure you understand how to read the comparison matrix.

Find the cell that represents the comparison of C. testosteroni andE. coli. What value is given in this cell? What does that value signifyabout the comparable rRNA gene sequences in those two organisms?Explain why some cells have a dash rather than a value. Whyare some cells shaded gray, with no value?

 

	Wheat mitochondrion	A. tumefaciens	C. testosteroni	E. coli	M. capricolum	A. nidulans
Wheat mitochondrion	-	48	38	35	34	34
A. tumefacians		-	55	57	52	53
C. testosterone			-	61	52	52
E. coli				-	48	52
M. capricolum					-	50
A. nidulans						-

 

Step-by-Step Solution

Answer

Bacteria are microorganisms that are unicellular in nature and belong to the class of prokaryotic organisms. According to the given data, the cell that represents the comparison of C. testosteroni and E. coli is 61. This value indicates that 61 per cent of the 617 nucleotide positions are the same in both species. 

 

Some other cells have dash other than the value because those cells would compare one species to itself. Some cells shaded gray with no value because those cells would duplicate comparisons shown elsewhere in the matrix. 

Step 1: Types of bacteria

Bacteria are microorganisms that can be seen everywhere, from extreme to normal temperatures. Based on shape, there are different types of bacteria like bacilli, cocci, and vibrio. 

Step 2: Use of Comparison Matrix

As the name suggests, a comparison matrix is a tabular representation between different species that shows similarities and differences between them. It is used to find the relationship between organisms by comparing them with each other. 

Step 3: C. testosteroni and E. coli

Comamonas testosteroni is a bacterium that belong to family Comamonadaceae. This bacteria is gram-negative in nature. They can live in a wide range of habitats such as water and soil. Escherichia coli is a bacterium that belongs to the family Enterobacteriaceae and is gram-negative in nature.