1. Give an example of a microorganism showing Pathogenicity and an example of a microorganism showing high Virulence.

2. Some people may already be immune to a certain pathogen such that when they are exposed to that particular pathogen they don’t get sick. How does this observation affect Koch’s postulates? How might the postulates be modified to account for the existence people who already have immunity?

1. CONTRAST the following pairs of terms:

a) Sterilize and Disinfect

b) Sanitization and Antisepsis

c) Bactericide and Bacteriostatic

2. Briefly describe any THREE CATEGORIES (three modes of action) of antibacterial drugs. Make sure to tell how they work and how bacteria have become resistant to them.

Please correct if they are wrong

1. Define each of the following and tell why it is important in epidemiology:

Mortality Rate

Morbidity Rate

Notifiable infectious disease

2. Outline the concept of HERD IMMUNITY and explain how it played a role in the Spanish Flu Pandemic of 1918.

You begin working in a research lab on campus. In the lab's freezer you find a tube of preserved bacterial cells. You want to grow the cells, but you do not know what their nutritional requirements are. What type of growth medium would be best? Could someone please explain to me why this is the correct answer? I am still unsure on whether I fully understand complex and define (minimal) media as well.

Incorrect Minimal medium supplemented with only essential growth factors
Incorrect Complex medium supplemented with inorganic nitrogen
Correct: Complex medium supplemented with a variety of growth factors
Incorrect Minimal medium supplemented with minerals, a carbon, nitrogen, and energy source
Incorrect Minimal medium supplemented with a variety of growth factors

Student must clearly show how nutrients are breaking down (like equations) just as seen the respective figures with appropriate enzymes. Student must identify what is the end product of each nutrient when digested. All these equations must be highlighted on your work sheet. This is the crux of this assignment.

Failure to follow these instructions will lead to significant loss of points

Assume that you are employed as a developmental biologist at NASA and the first returning mars explorer was found to have a small organism from mars onboard. The organism had the usual head-tail axis as well as dorsal-ventral polarity and what appeared to have right-left asymmetry. However upon analysis it was found to be composed of silicon based compounds and had no DNA, RNA or proteins at all. Discuss reasons why this organism would have similar developmental controls to those of earth’s carbon-based life and also discuss the opposing view as to why it would not

Describe two ways DNA is different than RNA. Name two roles that hydrogen bonds play in DNA? What is the difference between 10 nm fiber, 30 nm fiber and the DNA loops? Describe histones. What are they made of (ie the types of subunits). How do they interact with DNA?

The discussion for this week will focus on the importance of the two main topics of this chapter (photosynthesis and cellular respiration) to each other. There is a unique balance between these two energy cycles, and your postings should address something specific that addresses this idea. For instance, you can focus on one of the following: the history of these processes (which one we think started first and how that eventually led to the other one), different types of interactions, how other things affect them (poisons, temperatures, global climate, etc.), where the organisms are that perform these processes, which organisms have them, the different parts of each one of these and how they are related or how they came about, or the fact that there are cycles involved and what that may indicate. I need an outside source with this with in paragraph citation as well as a reference citing at the end..

Using what you know about stem cells and cell differentiation, explain HOW bone marrow cells can travel to the brain and differentiate into neurons. Make sure to discuss the role of cell signaling processes and cellular induction.

we learned not only about the importance of Mendel's Laws (segregation and independent assortment) to heredity, but also that there are a number of exceptions to Mendel's Laws. Inheritance follows some basic ideas, but can certainly appear to be a tricky thing if you don't fully understand the basis of how the traits of living things come about. This discussion, therefore, will focus on the exceptions to Mendel's Laws so that it will help you better understand how traits come about. You should look up more information on an exception and provide us with a better understanding of it in your postings. Different examples, importance, effects on traits including diseases, and other things can certainly be addressed. Please let me know if you have any questions on this interesting and relevant topic. I need 2 outside sources with IN-Paragraph citation as well as an ending citation. Use your words.. We also use https://openstax.org/details/concepts-biology

Explain how the “slide” of electrons down the electron transport chain is coupled to the production of ATP by chemiosmosis.