Difference between revisions of "Bacteria"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | [[Bacteria]] are [[unicellular]] [[Prokaryotic Cell|prokaryotes]] (with no [[membrane]] bound [[organelle]]s). | + | [[Bacteria]] are [[unicellular]] [[Prokaryotic Cell|prokaryotes]] (with no [[membrane]] bound [[organelle]]s) and are a [[domain]] of [[organism]]s in the [[Three Domain System|three domain system]]. |
===About Bacteria=== | ===About Bacteria=== | ||
Revision as of 20:30, 4 June 2019
Key Stage 3
Meaning
A magnified image of several bacteria.
Bacteria are unicellular micro-organisms that have no nucleus, mitochondria or chloroplast but do have cytoplasm, a cell membrane and a cell wall.
About Bacteria
- Bacteria can cause disease but some are important to keep us healthy.
- Some bacteria have a tail called a flagellum.
- Bacteria do not have a nucleus.
- The DNA of bacteria is in a loop. There are also smaller rings of DNA called plasmids.
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| A diagram showing the features of a bacterium. |
Key Stage 4
Meaning
Bacteria are unicellular prokaryotes (with no membrane bound organelles) and are a domain of organisms in the three domain system.
About Bacteria
- Bacteria can cause disease but some are important to keep us healthy.
- Disease causing bacteria are known as pathogenic bacteria.
- Some bacteria have a tail called a flagellum propel it move through water.
- Some bacteria are encased in a slime capsule which protects them from phagocytes and some toxic chemicals.
- Bacteria do not have a nucleus.
- The DNA of bacteria is in a loop. There are also smaller rings of DNA called plasmids.
 |
| A diagram showing the features of a bacterium. |