Biology homework help
BIOLOGY 181 LIFE IN THE OCEANS
UNIVERSITY OF MARYLAND UNIVERSITY COLLEGE
BUOYANCY EXERCISE
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Any marine animal that is an active swimmer must find some way to maintain neutral buoyancy; that is, it must have the same density as sea water. If it is more dense, it will sink to the bottom; if it is less dense, it will come bobbing to the surface like a cork.
The density of living tissue is approximately 105% that of sea water. In order to achieve neutral buoyancy, the animal needs to find some way to make itself less dense.
For each of the following groups of animals, use your knowledge you learned in the course and/or the internet, write short paragraph explaining how they maintain neutral buoyancy. For each group of animals, cite at least one webpage as a reference.
a) Bony fish
b) Sharks
c) Squids
d) Nautilus
1) What is a greenhouse gas? Distinguish between the greenhouse effect and global warming.
2) Discuss the four types of greenhouse gases. Give the sources of these gases, their relative contribution to global warming, and their half-lives in the atmosphere.
3) Discuss the evidence for global warming
4) What is a positive feedback process? Describe some ways global warming is a positive feedback process.
5) Discuss some possible effects of global warming
6) Discuss ocean acidification and its possible long-term effects
7) Discuss the factors contributing to the disappearance of coral reefs
Using this week’s assigned readings (and maybe an occasional peak at Google) you should be able to find the answers to your assigned discussion question. You must write one original post for your own assigned discussion question and two replies two other students’ posts. Each post should be at least 100 words in length. For full credit, link to a webpage that pertains to the subject. Have fun!
Dr. Hahn

Biology homework help
Determine your BMI
The point of this exercise is for the student to become familiar with his or her own score using a very common biometric indicator. Conduct the exercise using your own data. However, if you do not wish to disclose your own data, then conduct it again with reasonable fictitious data and report that.
Questions 1–4 below are short answer questions. Answer each question in the space provided. Total: 20 points
1. What is your height? ft in What is your weight? Lbs (5 points)
Go to: http://www.choosemyplate.gov/ then click on ONLINE TOOLS in the menu and select BMI CALCULATOR from the drop down menu. Follow the links to the calculator tool hosted by the CDC.gov website. Enter the information to determine your BMI (or use the fictitious data) by clicking the link to the Adult BMI Calculator.
Type the information from above into the appropriate spaces and then click: Calculate BMI.
2. What is your BMI? What recommendations are listed? (5 points)
 
On the left menu click on: Finding a Balance.
3. What is the caloric balance equation? (5 points)
 
4. Do you think you are in caloric balance? What are the recommended physical activity levels? (5 points)
 
Determine your daily caloric input. Prior to completing this part of the lab, you will need to write down everything that you eat and drink for an entire day. Make sure you record everything, and divide the foods into breakfast, lunch, dinner, and snacks. If you do not write down everything, you will have to try to think back and remember what you have eaten for entire day; make sure you include the full 24 hours. Try to pick a typical day. If you are going to a party or have to fast for a lab test, pick a different day.
· Go to the U.S. Department of Agriculture health food and fitness page: https://www.supertracker.usda.gov/ or copy and paste this address into your web browser.
· Click on: FOOD TRACKER
· Start with breakfast, and type in each food that you ate for one day. After each food you type in, click GO.
· Select the closest food from the list that is generated.
· Determine the amount and click the box for the meal in which the item was consumed.
· Click ADD.
· Continue this process until you have included all foods that you ate in a 24-hour period.
· Click on MY REPORTS in the menu at the top of the page.
· Click on FOOD GROUPS & CALORIES.
· Enter the Date and click on CREATE REPORT.
Answer the following short answer questions: Total: 12 points
1. How many total calories did you consume? (4 points)
 
2. What are empty calories? (4 points)
 
3. How many empty calories did you consume? (4 points)
 
Next, you will create a Nutrition Report.
· Click on MY REPORTS, and generate a NUTRIENTS REPORT.
· Export this report as a Word document by clicking on WORD just above the CREATE REPORTS button in the top right corner of the page.
· Open the Nutrient Report that you saved, and copy and paste it after the following question. Paste it in the area marked “Copy and paste your Nutrients Report here.”
Answer Question 4 in essay format. Your answer should be at least 100 words in length. Total: 20 points
4. Using the information in the report and the information that you calculated concerning your BMI, what did you learn about your eating habits? Is there anything that you would change? Are you deficient in any nutrients? Are you above the required amounts in any nutrients?
 
Copy and paste your Nutrients Report here. Total: 8 points