Question

A phylogenetic method that constructs evolutionary history based on overall similarity is called:

	A.	Biogeography
	B.	Evolutionary taxonomy
	C.	Systematics
	D.	Phenetics
	E.	Cladistics

1. Which of the following describe all existing bacteria?

   	A.	extremophiles, tiny, abundant
   	B.	morphologically diverse, metabolically diverse, extremophiles
   	C.	pathogenic, omnipresent, morphologically diverse
   	D.	small, harmful, fast-growing
   	E.	tiny, ubiquitous, metabolically diverse

Carl Woese and collaborators identified two major branches of prokaryotic evolution. What was the basis for dividing prokaryotes into two domains?

	A.	metabolic characteristics such as chemoautotrophy and photosynthesis
	B.	microscopic examination of staining characteristics of the cell wall
	C.	genetic characteristics such as ribosomal RNA sequences
	D.	ecological characteristics such as the ability to survive in extreme environments
	E.	metabolic characteristics such as the production of methane gas

Answer 1

Answere :

Question 1 : The correct option is "option D" i.e. Phenetics.

Explanation : It is a phylogenetic method or system of classification of species based on the degree of overall similarity based as many features as possible. It maintain evolutionary history based on morphology or some other observable features.

Question 2 : The correct option is "option E" i.e. tiny, ubiquitous, metabolically diverse.

Explanation : Small, found everywhere(cosmopolitan) and metabollically diversified - these are three important features that describes all existing bacteria.

Question 3 : The correct option is "option C" i.e. genetic characteristics such as ribosomal RNA sequences.

Explanation : Three domain system was given by  C. Woese and his collaborators. It include three domains : Bacteria, Archea and Eukarya.

This classification is based on sequence of ribosomal RNA.