Answer:
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Explanation:
Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. As organized in the Three Domain System, prokaryotes include bacteria and archaeans. Some prokaryotes, such as cyanobacteria, are photosynthetic organisms and are capable of photosynthesis.
Many prokaryotes are extremophiles and can live and thrive in various types of extreme environments including hydrothermal vents, hot springs, swamps, wetlands, and the guts of humans and animals (Helicobacter pylori).
Prokaryotic bacteria can be found almost anywhere and are part of the human microbiota. They live on your skin, in your body, and on everyday objects in your environment.Prokaryotic cells are not as complex as eukaryotic cells. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid.
Prokaryotic organisms have varying cell shapes. The most common bacteria shapes are spherical, rod-shaped, and spiral.
Using bacteria as our sample prokaryote, the following structures and organelles can be found in bacterial cells:
Capsule: Found in some bacterial cells, this additional outer covering protects the cell when it is engulfed by other organisms, assists in retaining moisture, and helps the cell adhere to surfaces and nutrients.
Cell Wall: The cell wall is an outer covering that protects the bacterial cell and gives it shape.
Cytoplasm: Cytoplasm is a gel-like substance composed mainly of water that also contains enzymes, salts, cell components, and various organic molecules.
Cell Membrane or Plasma Membrane: The cell membrane surrounds the cell's cytoplasm and regulates the flow of substances in and out of the cell.
Pili (Pilus singular): Hair-like structures on the surface of the cell that attach to other bacterial cells. Shorter pili called fimbriae help bacteria attach to surfaces.
Flagella: Flagella are long, whip-like protrusions that aid in cellular locomotion.
Ribosomes: Ribosomes are cell structures responsible for protein production.
Plasmids: Plasmids are gene-carrying, circular DNA structures that are not involved in reproduction.
Nucleoid Region: Area of the cytoplasm that contains the single bacterial DNA molecule.
Prokaryotic cells lack organelles found in eukaryoitic cells such as mitochondria, endoplasmic reticuli, and Golgi complexes. According to the Endosymbiotic Theory, eukaryotic organelles are thought to have evolved from prokaryotic cells living in endosymbiotic relationships with one another.
Like plant cells, bacteria have a cell wall. Some bacteria also have a polysaccharide capsule layer surrounding the cell wall. This is the layer where bacteria produce biofilm, a slimy substance that helps bacterial colonies adhere to surfaces and to each other for protection against antibiotics, chemicals, and other hazardous substances.
Similar to plants and algae, some prokaryotes also have photosynthetic pigments. These light-absorbing pigments enable photosynthetic bacteria to obtain nutrition from lightMost prokaryotes reproduce asexually through a process called binary fission. During binary fission, the single DNA molecule replicates and the original cell is divided into two identical cells.
Steps of Binary Fission
Binary fission begins with DNA replication of the single DNA molecule. Both copies of DNA attach to the cell membrane.
Next, the cell membrane begins to grow between the two DNA molecules. Once the bacterium just about doubles its original size, the cell membrane begins to pinch inward.
A cell wall then forms between the two DNA molecules dividing the original cell into two identical daughter cells.
Although E.coli and other bacteria most commonly reproduce by binary fission, this mode of reproduction does not produce genetic variation within the organism.
Introduction: (paragraph 1)
Who you are and who you are working for and what you are creating.
Quickly talk about the three criterion that your organization were suppose to focus on.
Tell me a little about your treatment drug. Includes %, side effect, cost per 1000 treatments.
Paragraph 2
Introduce criterion 1. Why is this important? Why you focused on this criterion.
Tell me now about your optimal design focused on criterion 1. (more detail than intro)
How did you make this criterion work? Compare to a different design. (make it up if you need to) Dosage, days, combinations of drugs.
Paragraph 3
Introduce criterion 2. Why is this important? Why you focused on this criterion.
Tell me now about your optimal design focused on criterion 2. (more detail than intro)
How did you make this criterion work? Compare to a different design. (make it up if you need to) Dosage, days, combinations of drugs.
Paragraph 4
Introduce criterion 3. Why is this important? Why you focused on this criterion.
Tell me now about your optimal design focused on criterion 3. (more detail than intro)
How did you make this criterion work? Compare to a different design. (make it up if you need to) Dosage, days, combinations of drugs.
Paragraph 5 Conclusion
Conclude talking about your trade-offs. Make your tradeoff not a big deal.
Talk up your design, Focus on the positive
Your end statement should reiterate your criterions.
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