Question

A bacterial colony is produced from
A. Single bacterium by its repetitive division
B. Multiple bacteria without replication
C. Clumping of two to three bacteria
D. A single bacterium without cell division

Answer 1

Hint: The colony is the visible volume of microorganisms that are produced from the single mother cell, so the daughter cells which are produced in the colony are genetically similar. These bacteria are grown as colonies in many media.

Complete answer:
The bacteria or some other microorganisms are usually cultured in the media, in order to identify and different bacteria have different morphology.
For example, if the mixed bacteria are cultured on the agar plate, they show different characteristic features and all of them can be identified by the different criteria.
Different bacteria have different colors and different shapes, and morphology.
Usually, whole colonies are of different shapes ranging from the round to irregular.
The colonies which are produced may be transparent and translucent.
And the colonies which are produced may have smooth, glistening or shiny surfaces.
The medium usually used for the microbial culture is Agar.
As they grow on the culture media, they grow by consuming the nutrients and they divide repeatedly from the single mother cells, because of this repeated division the millions and billions of the bacteria produced and the pile-up and seen as visible colonies.

So from the above explanation, it can be said that it is due to repeated cell division.

Note:
Some basic factors that require for the bacteria to grow are the nutrition, water and air( it depends on the type of bacteria like aerobic or anaerobic) and temperature, PH of the medium and salts, all of these things play a major role in the formation of bacterial colony.