Using clay, demonstrate how cocci can divide in several planes and show the outcome of this division. Show how the arrangements of bacilli occur, including palisades.
Introduction:
Cocci show a variety of arrangement and can also be categorized on that basis. It is mainly influenced by the pattern of division and how cells remain attached even after that.
Explanation of Solution
Bacterial cells can be classified on the basis of their arrangement, or grouping pattern. A wide variety of arrangements is seen in cocci. This is influenced by the division pattern and the attachment properties of the cell. The cells can appear as single, in pairs (diplococci), in tetrads (groups of four), irregular clusters (staphylococci and micrococci), in chains (streptococci), or in complex cubical packets (sarcina). These arrangements when coccus is divided along single plane, perpendicular planes, or in several intersecting planes.
Bacilli do not exhibit wide variety in arrangement as they divide along the transverse plane. So they can occur as single cell or in pairs with their ends attached (diplobacilli), or as chains of several cells (streptobacilli). Palisade arrangement is displayed only by corynebacterial, eherre the cells remain partially attached by a small hinge region at the end. These cells tend to snap back over each other too form rows of cells arranged side by side.
Hence, on the basis of division pattern, different types of cocci arrangements are obtained and this is used as a criterion to categorize bacterial cells.
Want to see more full solutions like this?
Chapter 4 Solutions
Foundations in Microbiology
- what is an intermittent water course and what kind of fish habitat it would providearrow_forwardwhy are native freshwater mussels are an important part of great lakes ecosystemarrow_forwardwhat morphological features differentiate the lamprey species and other species in the great lakesarrow_forward
- There are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forwardfour fish or mussel species that are native to the great lakesarrow_forwardThere are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forward
- four physial characteristics of a fish or a mussel that would help you identify it to a speciesarrow_forwarddescribe what you would do in this situation, you are working ona. river and it will take 20 minutes by boat to get back to the field truck, you are 1 hour from finishing the field work on the last day of field trip. you hear thunder int he dsitnace, what did you do?arrow_forwardunu grow because auxin is still produced in the tip to Another of Boysen and Jensen's experiments included the use of mica, explain why one of the shoots was able to show phototropism and the other was not. Mica Wafer Ligh c. They then t but this time permeable n shoot. Why phototropis Light Mica Wafer Coleoptile tips Tips removed: agar Explain why the shoo direction after the ag the cut shoot, even tarrow_forward
- Discussion entries must be at least 250 words to fulfill the assignment requirements. You must complete your entry before you will be able to see the responses of other students. Responses to other students are encouraged but not required. Grading for discussion entries will be based on application of course concepts, proper grammar, and correct punctuation. Read one the attached article and explore the Human Development Index (https://hdr.undp.org/data-center/human-development-index#/indicies/HDI). In your opinion, is the Human Development Index a good measure of the well- being of the people of a nation? Are the items measured in the HDI valid and relevant in the modern global economy? How are they related to the political economy of a nation? The attached articles propose some alternative measures of well-being. In your opinion, are there other measures of well-being that might be better alternatives to the items in the current HDI?arrow_forwardA patient visits her doctor with symptoms typical of a bladder infection. She is immediately prescribed an 800 mgdose of antibiotic (bioavailability = 1/2, t½ = 12 h). The corresponding plasma concentration of drug is found to be 96 micrograms/ml. What is the volume of distribution of this drug? Please round to the nearest liter.arrow_forwardA 10 mg/Kg dose of a drug is given by intravenous injection to a 20 Kg dog. What would the volume of distribution be if the drug had been given orally and only 50% of the drug was absorbed (the concentration of drug at time = 0 is 0.1 mg/L)? Be sure to show your work.arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College