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Biology Journal Essay

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1. Are Bacteria prokaryotic or eukaryotic?
They are Prokaryotic, because they do not possess a true nucleus.
2. Describe the three common shapes of bacteria
Coccus (spherical)
Bacillus (rod)
Spirillum (twisted body shape)
3. Are Bacteria heterotrophic or autotrophic?
Most bacteria are heterotrophs (like us.) Heterotrophs must get their food from another source (such as in our gut or on our skin.) Some bacteria are autotrophs, which means they make their own food from performing either photosynthesis (using the sun) or chemosynthesis (using inorganic compounds.)
4. Do Bacteria cells have a cell wall?
They do have a cell wall. It is made of complex chemicals composed of polysaccharides and proteins.
5. How do bacteria reproduce?
Bacteria reproduce asexually, so nothing would be inappropriate in any way. And they can't reproduce by themselves. They basically attach onto a host cell from another organism, and wait till that cell divides. Then the bacteria is on both cells... and every cell that ever divides with bacteria on it.
6. Are Archaea prokaryotic or eukaryotic?
Archaea are prokaryotic (lacking a nucleus).
7. Do Archaea cells have a cell wall?
Yes, they have a cell wall made of peptidoglycans.
8. Describe the three major types of Archaea.
The crenarchaeota, which are characterized by their ability to tolerate extremes in temperature and acidity. The euryarchaeota, which include methane-producers and salt-lovers; and the korarchaeota, a catch-all group for archaeans about which very little is known.
9. Are Protists prokaryotic or eukaryotic?
Protists are eukaryotic
"Protists are a diverse group of eukaryotic microorganisms."
There exist autotrophic and heterotrophic bacteria.
10. Explain the endosymbiotic theory.
The endosymbiotic theory states that higher order organisms (read eukaryotes) developed over time as a symbiotic relationship developed between earlier prokaryotic organisms. This is most routinely applied to the conceptual...

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