Piyush is asked to classify samples of bacteria as bacilli, cocci, or spirilla.

Which is the most useful strategy for him to follow?

A. Analyze the DNA of the bacteria.

B. Raise colonies of the bacteria in several growth media.

C. Use a microscope to observe the shapes of the bacteria.

D. Use a microscope to observe the colors of the bacteria.

C. Use a microscope to observe the shapes of the bacteria.

Explanation:

Bacteria is a type of pathogenic micro-organisms. They are mostly known to cause diseases and can be viewed using an electron microscope.

Bacteria have different shapes and colors. The shapes include bacilli (rod shaped), cocci (spherical) or spirilla (twisted).

The most useful strategy will be to use a microscope to observe the shapes of the bacteria.