G. Answer these questions.
1. Describe classification of bacteria based on their
shape?
Answers
Answer:
bacteria are classified in five groups according to their Basic shapes . sphericel ( cocci) )
Classification of bacteria
Bacteria are usually grouped into three categories, classified by shape: spherical, cylindrical and spiral.
The Coccus
The coccus bacteria are spherical or oval in shape, like a berry. In fact, the name is derived from the Greek word "kokkos," which means berry. These are some of the smallest and simplest bacteria, with an average size of about 0.5 to 1.0 micrometers in diameter. (A micrometer is about 1/1,000,000 of a meter.)
The Bacillus
The bacillus bacteria are rod-like in shape. These bacteria are a bit more complex than the coccus family and, on average, are 0.5 to 1.0 microns wide by 1.0 to 4.0 microns long.
A number of these bacteria are pathogenic, like Yersinia pestis.
The Spirochete
The spirochete bacteria are spiral in shape. When viewed under a microscope, they appear almost worm-like, wiggling wildly and moving about. Two of the more well-known members of the spirochete family are Treponema pallidum, the bacteria that causes syphilis, and Leptospira, which causes the illness leptospirosis.
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