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Archaea and Bacteria

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Robert Williford

on 23 February 2015

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Transcript of Archaea and Bacteria

In this section we will discuss how we classify bacteria, how they reproduce, what shape they are,, the differences between archaea and bacteria,, how it is good for the environment, how its good for people, and how bacteria can be harmful.
Archaea and Bacteria
Prokaryotes must fit into either the kingdom archaea or bacteria. They are single celled, prokaryotic cell. This means they have no nucleus, have circular dna and are very simple cells.

Bacterial Reproduction
Classifying Archaea and Bacteria
Archaea and bacteria reproduce by a method called
binary fission.
Binary fission is where a prokaryote's DNA is replicated before the cell membrane begins to split the cell into two.
The Shape of Bacteria
Kingdom of Bacteria
The kingdom bacteria has more individual organisms than all the other five kingdoms combined. They can live on solids, in liquids, or even in air. They have been around for over 3.5 billion years.
Bacteria get their name from being consumers. Many are decomposers and break down dead material. Some are parasites that feed off of a host and some are even producers that can photosynthesize to produce their own food.
Kingdom Archaea
Archaea thrive where no other living things can survive. They have been found in such places as the acid hot springs in Yellowstone, beneath 430m of ice in Antarctica, and even 8km below the earth's surface.

There are three main types of Archaea: methane makers, heat lovers, and salt lovers.
Good for the Environment
Nitrogen-Fixing
: Plants need nitrogen to survive but are unable to take it from the air. Nitrogen-fixing bacteria consume nitrogen in the air and change it into a form that plants can use.

Bioremediation:
the use of bacteria and other microorganisms to change pollutants into harmless chemicals. It is used to clean up industrial, agricultural, and municipal wastes as well as oil spills.
Good for People
If the environment is not ideal for a certain type of bacteria to reproduce they can grow a thick protective membrane that will allow them to survive such harsh conditions as acid and boiling water until the conditions become perfect at which time they will reproduce. When they form this protective membrane they are called
endospores.
Bacteria is used to fight disease causing bacteria.

Antibiotics
- medicines used to kill bacteria and other microorganisms.

Insulin - people with diabetes cannot produce the insulin needed to maintain their blood sugar level so scientists use bacteria to produce it for them.

Food - bacteria gives us cheese, yogurt, buttermilk, and sour cream.
Bad for People
pathogenic bacteria -
bacteria that cause diseases.

Bacterial diseases: dental cavities, ulcers, strep throat, food poisoning, bacterial pneumonia, lyme disease, tuberculosis, leprosy, typhoid fever, bubonic plague.
Review:
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