Question

A colony on an agar plate that is slightly and equally elevated and unbroken would be classified as

Answer 1

The right answer is a raised, circular colony.

In biology, a colony (from Latin colonia) is a group of individual organisms belonging to the same living species grouped together in a particular way of life.  

The appearance of the colonies is the primary character used to guide the diagnosis made by the bacteriologist.  

The shape of the colonies depends on:  

A) intrinsic factors to the bacteria:  

- mobility  

- morphology: size, shape, contour, relief, surface  

- production of a capsule  

- production of extracellular material  

- pigmentation  

- presence of fimbriae  

B) extrinsic factors:  

- Gradients of solutes created around the colony  

- presence of dyes in the culture medium

Answer 2

A colony on an agar plate that is slightly and equally elevated and unbroken would be classified as circular form of colony. These are pinhead colonies which are usually convex on its entire margins. These form of nutrient agar plates are usually raised or elevated and unbroken.