What Causes Sperm Count Drop and Affects Humanity?

/in /by

Sperm Assignment

What Causes Sperm Count Drop and Affects Humanity?

 

Why does your plant matter or how is it used? How does your plant grow? Does it need any special water, light, soil, or temperature? Describe the biology. Is it a tree, a perennial, a biennial, an annual, shrub, a vine, etc.?

/in /by

Sunflowers ‘Helianthus annuus’

COMMUNICATING ABOUT PLANTS CULTIVATING PLANTS LAB C

WRITE A WELL-RESEARCHED PAPER Write at least three full pages on your topic covering an introduction, the points that you want to hit home with your audience, and a final conclusion or take away.

Your goal is to educate, inspire, and entertain your audience about your topic. Why should they care? Be sure you include the following details:

  • Give us the background on your plant with the name correctly spelled in each case, and include a argument sentence that tells us what your paper is about.
  • Why does your plant matter or how is it used? Give us at least three reasons what role your plant serves in society.
  • How does your plant grow? Does it need any special water, light, soil, or temperature?
  • Describe the biology. Is it a tree, a perennial, a biennial, an annual, shrub, a vine, etc.?
  • Where does your plant grow? Can it grow in Texas?
  • Are there any cultivating techniques that are unique to your plant?
  • What are three unique genetic traits about your plant?
  • What are three challenges your plant has to grow?
  • Wrap it up with an engaging conclusion.

Use appropriate terminology in your paper. Since you are learning about all kinds of methods of cultivating plants in class, why not use the correct terms?

Feel free to be creative about the way you present your information. © your text should start at the very top of the page. Then, provide your literature cited after the three pages.

 

Find a background research article that supports what you wrote in #3 above. Write the correct APA format of the source below. Also, if you were to use this source in submitted work, it would need a citation. Write the citation in the space provided.

/in /by

Biology Question

Find Background Research, Lab 3 Assignment

Complete this assignment and attach your document as a word file to the correct dropbox on Elearning before the due date.  (20 points)

 

  1. You did three different simulations this week. In the chart below, identify all of the variables (independent, dependent and ones being held constant) that you found while performing each simulation.  Some were given to you in the simulation protocol and/or can be deduced by what you experienced.  List them all below.

 

Simulation Variables
Test for Fat  

List your variable here.  This list can be as long as it needs to be.
 

Emulsification of Lipids

  

List your variable here.  This list can be as long as it needs to be.
 

Test for Protein

  

List your variable here.  This list can be as long as it needs to be.

 

  1. Using your chart in #1, highlight in red the dependent variable in each trial. Highlight in green the independent variable you changed in each trial. Highlight in blue every additional variable you could change in each trial (these are things that were held constant but could actually be changed in a subsequent trial).

 

  1. Your simulation of Emulsification of Lipids resulted in a qualitative description of the outcome from the experiment. How could you take the same apparatus that you have available in the simulation to make a quantitative test?  If I gave you 3 unknowns that may or may not be an emulsifier, how would you determine with the given equipment something that provides a number that describes what you observe?  You can add anything to the process that you have available to you at home, your apartment or your dorm, but no special scientific equipment.  Make sure you explain in detail so a TA or myself can understand what you intend.

 

  1. Find a background research article that supports what you wrote in #3 above. Write the correct APA format of the source below.  Also, if you were to use this source in submitted work, it would need a citation.  Write the citation in the space provided.

 

  1. If we were in a physical lab, we could do a biuret assay to determine the amount of protein in a solution. We could measure the amount of light absorbance at 540 nm using a spectrophotometer.  This would give us a number that would allow us to determine the amount of protein in an unknown solution.

 

To do this, we first need to create a standard curve of known amounts of protein.  A standard curve uses data results from known amounts of a substance to create a line on a graph.  Work through the process of creating a standard curve using the attached excel file.  You should be making a scatter chart.  The data you are using come from Keppy and Allen, 2009.  Attach your excel file that includes your graph to the assignment dropbox when you submit this assignment.

 

  1. Three unknown protein solutions were measured using the biuret assay and the resulting absorption at 540 nm was observed. Using your standard curve created above, determine the amount of protein in each unknown. It is not easy to get an exact number from a graph.  Get as close as you can within the limitations of the graph.

 

Unknown Absorbance at 540 nm Amount of Protein (ug/ml)
A .3000  
B .2000  
C .1000  

 

  1. Now that you understand proteins and lipids, I want you to combine and connect both ideas. Synthesize some new ideas.  What would be required of a protein to act as an emulsifier?  Using your best understanding of proteins, amino acids and emulsifiers, describe a protein that could function as an emulsifier in the simulation you did this week.  Make sure you explain in detail so a TA or myself can understand what you intend.

 

 

 

 

You have an original cell density of 2.10 x 107 CFU/mL. What is this number in its non-scientific notation or “regular” format?

/in /by

You have an original cell density of 2.10 x 107 CFU/mL. What is this number in its non-scientific notation or “regular” format?

If you’ve taken 500 ul of a bacterial culture and added 500 ul of DI water, you have achieved what dilution (i.e. what is the dilution factor)?

Group of answer choices

  • 1:4 (or 1/4)
  • 1:2 (or 1/2)
  • 1:3 (or 1/3)

You conduct the following serial dilution:

Step 1: You’ve diluted 100 ul of a bacterial stock with 800 ul distilled water, but the sample still needs further dilution

Step 2: You then take 100 ul of the dilution from step 1 and dilute it further with 400 ul of distilled water.

A.) What is the dilution factor after Step 1? (2 points)

B.) What is the final/total dilution factor at the end of Step 2 from the starting stock? (2 points)

 Show your work for both.

 

You conduct the following serial dilution:

Step 1: In tube 1, you add 10 ul of plasma to 990 ul of distilled water.

Step 2: In tube 2, you then take 100 ul from tube 1 and add 900 ul of distilled water.

Step 3: In tube 3, you then take 100 ul from tube 2 and add 900 ul of distilled water.

What is the final/total dilution factor in tube 3 at the end of step 3

You were instructed to add 2.0 mL out of 6.0 mL of an undiluted sample to 98 mL of sterile diluent. Instead, you add the entire 6.0 mL to the 98 mL.

A.) What was your intended dilution factor? (2 points)

B.) What was your actual dilution factor? (2 points)

Show your work.

 

The plate with 242 colonies was inoculated with 100 µL Volume of a 10-9 Dilution.

Given the formula OCD = CFU/V x D, what as the Original Colony Density?

You spread 0.1 mL volume of a 10-7 dilution onto a nutrient agar plate. After 24 hours of incubation at 37°C, there were 140 colonies of bacteria on the plate.

A.) What is the original concentration (OCD) of bacteria in the stock sample this dilution came from? (2 points)

B.) Using the OCD value from part A, determine the number of colonies that would be expected to grow on a plate that is inoculated with 0.1 mL volume of 10-9 dilution from this same stock of bacteria. (2 points)

Show your work for both.

 

Demonstrate the ability to make and run electrophoresis gels. Demonstrate an understanding of electrophoresis and running different percentage gels.

/in /by

Bacterial Culture for Plasmid Amplification

  • Execute the beginning of a bacterial culture
  • Demonstrate the ability to make and run electrophoresis gels.
  • Demonstrate an understanding of electrophoresis and running different percentage gels.

 

Write an essay based on following question: ”Which are the three important enzymes of liver?”

/in /by

Important Enzymes of Liver

Write an essay based on following question: ”Which are the three important enzymes of liver?”

 

Using the Framingham Heart Study dataset provided, find the Z-Score using the BMI data by calculating the Standard Deviation on the Sample and the Average BMI of the sample. Discuss briefly what this Z-Score reveals about the BMI data.

/in /by

Find the Z-Score

Using the Framingham Heart Study dataset provided, find the Z-Score using the BMI data by calculating the Standard Deviation on the Sample and the Average BMI of the sample. Discuss briefly what this Z-Score reveals about the BMI data.

Requirements :

  • should be 2 pages of content in addition to the title and reference pages to discuss and display the findings.
  • Provide support for the statements with in-text citations from a minimum of two scholarly, peer-reviewed articles
  • Follow APA 7th edition .

 

Write approximately one-page essay, describing your previous research experience, including details of the project, what you did, what you learned, and the significance of the work.

/in /by

A Research Statement

Write approximately one-page essay, describing your previous research experience, including details of the project, what you did, what you learned, and the significance of the work.

How do stars form from the interstellar medium? What defines the main sequence stage of a star? What happens after a low mass star leaves the main sequence? What types of stellar remnants will a low mass star leave behind?

/in /by

Life Cycle of Stars

In a 2 to 3 paragraph essay, answering the following questions concerning star formation and evolution:

  • How do stars form from the interstellar medium?
  • What defines the main sequence stage of a star?
  • What happens after a low mass star leaves the main sequence? What types of stellar remnants will a low mass star leave behind?
  • What happens after a high mass star leaves the main sequence? What types of stellar remnants will a high mass star leave behind?

 

 

 

Explore the topic and gather the information needed to teach your fellow learners. Create these items using infographics (Canva.com) or video (Powtoon.com).

/in /by

Infographic or video presentation

This week, you will have the opportunity to unleash your creativity in order to help you and your classmates study.

Assignment Instructions:

For this assignment you will be able to create an infographic or video presentation.

  1. Select one of the topics below
  • Disorders of Platelets, (Chapter 21, p. 541)
  1. Explore the topic and gather the information needed to teach your fellow learners.
  2. Create these items using infographics (Canva.com) or video (Powtoon.com). If you would like to use a different media source, email your Instructor first for permission.