Prokaryotic Bacteria: Characteristics and Importance
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Prokaryotic Bacteria: Characteristics and Importance

Learn about prokaryotic bacteria, the smallest, simplest, and oldest cells on earth. Explore their simple structure, lack of organelles, and their dominance on earth in terms of numbers. Discover why bacteria are the most common organisms and their significance in the biological world.

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@GlamorousPoisson

Questions and Answers

What is a key characteristic of bacteria in terms of their design?

They have a simple structure with no organelles

How long have bacteria survived as the only kinds of cells on Earth?

2 billion years

What makes bacteria the most common organism on Earth?

Their high number of cells

How many formally named 'species' of bacteria exist?

<p>100,000</p> Signup and view all the answers

Why is it challenging to study most bacteria?

<p>They don't form isolated colonies</p> Signup and view all the answers

In what way do microbial communities resemble multicellular organisms?

<p>They take on some characteristics of multicellular organisms</p> Signup and view all the answers

What is the main advantage of microbial communities for individual species?

<p>Protection from predators</p> Signup and view all the answers

What characterizes colonies of bacteria in nature?

<p>Distinctive features such as color and smell are common</p> Signup and view all the answers

What is the purpose of selective media in bacterial cultures?

<p>Prevent the growth of certain bacteria</p> Signup and view all the answers

What is a characteristic of bacterial blooms?

<p>They result from rapid reproduction of bacteria</p> Signup and view all the answers

Where do biofilms or microbial mats typically grow?

<p>On rocks, streambeds, and soil crumbs</p> Signup and view all the answers

What is the main function of a bacterial capsule?

<p>Protect from drying out and phagocytosis</p> Signup and view all the answers

What is the significance of stromatolites in the context of early Earth?

<p>Produced most of the O2 in Earth's early atmosphere</p> Signup and view all the answers

What differentiates bacterial cells from eukaryotic cells?

<p><strong>Bacterial cells lack a nucleus</strong></p> Signup and view all the answers

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