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Chapter 1 : Bacteria: Many Friends, Few Enemies

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Abstract:

Bacteria are unicellular living organisms that make up one of the three domains of life: , , and (Fig. 1). This model of three branches stemming from a common ancestor was first proposed by Carl Woese in 1977. The absence of a nucleus is one major difference between prokaryotes and eukaryotes. Eukaryota or eukaryotes include animals, plants, fungi, and protozoa, which all have nuclei; bacteria and archaea are prokaryotes and do not have a nucleus. The DNA of prokaryotes is non-membrane bound, unlike in eukaryotes. But do not assume that bacteria are merely small sacks full of disorderly contents. Their “interior” is in fact very well organized.

Citation: Cossart P. 2018. Bacteria: Many Friends, Few Enemies, p 1-7. In The New Microbiology: From Microbiomes to CRISPR. ASM Press, Washington, DC. doi: 10.1128/9781683670117.ch1
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Figures

Image of Figure 1.
Figure 1.

The three large domains of life. , , and have a common ancestor.

Citation: Cossart P. 2018. Bacteria: Many Friends, Few Enemies, p 1-7. In The New Microbiology: From Microbiomes to CRISPR. ASM Press, Washington, DC. doi: 10.1128/9781683670117.ch1
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Image of Figure 2.
Figure 2.

The four main types of bacteria: bacilli (), cocci ( or meningococci), spirals (), and comma-shaped ().

Citation: Cossart P. 2018. Bacteria: Many Friends, Few Enemies, p 1-7. In The New Microbiology: From Microbiomes to CRISPR. ASM Press, Washington, DC. doi: 10.1128/9781683670117.ch1
Permissions and Reprints Request Permissions
Download as Powerpoint

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