UMUC Biology 102 / 103 Lab 6: Taxonomy ANSWER KEY

This contains 100% correct material for UMUC Biology 103 LAB06. However, this is an Answer Key, which means, you should put it in your own words. Here is a sample for the Pre lab questions answered:

Pre-Lab Questions

 

1. Use the following classifications to determine which organism is least related out of the three. Explain your rationale. (1 pts)

 

 

The Eastern Newt is the least related organism out of the three. While all three are classified into the same domain, kingdom, phylum and class the Eastern Newt is in a different order than the American Green Tree Frog and the European Fire-Bellied Toad.

 

2. How has DNA sequencing affected the science of classifying organisms? (1 pts)

DNA sequencing has allowed for the comparison of genes at the molecular level as opposed to physical traits at the organism level. Physical traits can be misleading when classifying how related two organisms are. DNA sequencing can also trace relatedness through generations and more accurately assess how closely related two organisms are.

 

3. You are on vacation and see an organism that you do not recognize. Discuss what possible steps you can take to classify it. (1 pts)

The organism’s physical features can be used to compare it to known organisms. Some physiological features can even possibly be used to help classify it.

 

The rest of the questions in the lab are answered as well:

Experiment 1: Dichotomous Key Practice

Data Tables and Post-Lab Assessment

Table 3: Dichotomous Key Results

Organism

Binomial Name

i  

Selasphorus platycercus

ii  

Mus musculus

iii  

Vaccinium oxycoccos

iv  

Ramphastos vitellinus

v

Quercus abla

vi  

Evathlus smithi

vii  

Helix aspersa

viii  

Taeniopygia guttata

ix  

Lonicera japonica

xi  

Oryctes nasicornis

xii  

Taeniopyga guttata

xiii  

Musa acuminata

 

Seems like x was omitted, which would have been Carduelis tristis.

 

Post-Lab Questions

1.    What do you notice about the options of each step as they go from number one up?

 

 

2.    How does your answer from Question 1 relate to the Linnaean classification system?

 

Experiment 2: Classification of Organisms

Data Tables and Post-Lab Assessment

Table 2: Key Characteristics of Some Organisms

Organism

Kingdom

Defined Nucleus

Mobile

Cell Wall

Photosynthesis

Unicellular

E. Coli

 

 

 

Yes

 

Yes

Protozoa

 

Yes

Yes

No

 

Yes

Mushroom

 

Yes

 

Yes

 

 

Sunflower

 

Yes

Yes

Yes

Yes

 

Bear

 

Yes

Yes

 

 

 

 

 

 

   

 

Post-Lab Questions

1.    Did this series of questions correctly organize each organism? Why or why not?

 

 

2.    What additional questions would you ask to further categorize the items within the kingdoms (Hint: think about other organisms in the kingdom and what makes them different than the examples used here)?

 

 

 

3.    What questions would you have asked instead of the ones that you answered about when classifying the organisms?

 

 

 

case study

  

CASE STUDY ASSIGNMENT: 

INSTRUCTION. PLEASE SEE ATTACHMENT  ARTICLE FOR ALL 12 CASE STUDY.

THERE ARE TOTAL OF 12 CASE STUDY:

1) PLEASE DO ALL CASE STUDY SEPARABLY

2) AS YOU READY THE CASE STUDY THERE ARE QUESTIONS WITH IN THE CASE STUDY THAT NEED TO BE ANSWER

3) PLEASE TYPE THE QUESTIONS WITH IN EACH CASE STUDY AND ANSWER IT, AGAIN TYPE NO HAND WRITING.

MY PRICE ON THIS ASSIGNMENT IS FRAME.

UMUC Biology 102/103 Lab 2: The Chemistry of Life ANSWER KEY

This is the correct material for UMUC Biology 102/103 Lab 2: The Chemistry of Life. However, this is an Answer Key, which means, you should put it in your own words. Here are the questions that will be answered. Attached is the lab that is fully completed when purchased. Enjoy!

Pre-Lab Questions

1.    Nitrogen fixation is a natural process by which inert or unreactive forms of nitrogen are transformed into usable nitrogen. Why is this process important to life?

 

2.    Given what you have learned about the hydrogen bonding shared between nucleic acids in DNA, which pair is more stable under increasing heat: adenine and thymine, or cytosine and guanine? Explain why.

 

 

3.    Which of the following is not an organic molecule; Methane (CH4), Fructose(C6H12O6), Rosane (C20H36), or Ammonia (NH3)? How do you know?

 

 

 

 

 

Experiment 1: Testing for Proteins

Data Tables and Post-Lab Assessment

Table 1: A Priori Predictions

Sample

Initial Color

Final Color

Is Protein Present?

1. Albumin Solution

 

 

 

2. Gelatin Solution

 

 

 

3. Glucose

 

 

 

4. Water

 

 

 

5. Unknown

 

 

 

 

Sample

Initial Color

Final Color

Is Protein Present?

1. Albumin Solution

 

 

 

2. Gelatin Solution

 

 

 

3. Glucose

 

 

 

4. Water

 

 

 

5. Unknown

 

 

 

Table 2: Testing for Proteins Results

 

 

 

Post-Lab Questions

1.    Write a statement to explain the molecular composition of the unknown solution based on the results obtained during testing with each reagent.

 

2.    How did your a priori predictions from Table 1 compare to your actual results in Table 2? If there were any inconsistencies, explain why this occurred.

 

3.    Identify the positive and negative controls used in this experiment. Explain how each of these controls are used, and why they are necessary to validate the experimental results.

 

 

4.    Identify two regions which proteins are vital components in the human body. Why are they important to these regions?

 

 

5.    Diet and nutrition are closely linked to the study of biomolecules. Describe one method by which you could monitor your food intake to ensure the cells in your body have the materials necessary to function.

Experiment 2: Testing for Reducing Sugars

Data Tables and Post-Lab Assessment

Table 3: Testing for Reducing Sugars Results

 

Sample

Initial Color

Final Color

Reducing Sugar Present

1 – Potato

 

 

 

2 – Onion

 

 

 

3 – Glucose Solution

 

 

 

4 – Water

 

 

 

5 – Unknown

 

 

 

 

 

Post-Lab Questions

1.    What can you conclude about the molecular make-up of potatoes and onions based on the test you performed? Why might these foods contain these substance(s)?

 

2.    What results would you expect if you tested ribose, a monosaccharide, with Benedict’s solution? Biuret solution?

 

 

 

Experiment 3: What Household Substances are Acidic or Basic?

Data Tables and Post-Lab Assessment

Table 4: pH Values of Common Household Substances

 

Substance

pH Prediction

pH Test Strip Color

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Post-Lab Questions

1.    What is the purpose of determining the pH of the acetic acid and the sodium bicarbonate solution before testing the other household substances?

 

2.    Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations.

 

3.    Name two acids and two bases you often use.

BIO GENETICS LAB 2 QUESTIONS HELP

 NEED HELP WITH BLANK BOX QUESTION(question 1 and 4 in conclusion part. )* It would be nice if you can check my answeres too. NOTES:

Tube Sample Lane

1 1 kb DNA ladder 1

2 Mother’s DNA 2

3 Child’s DNA 3

4 A.F. #1 DNA 4

5 A.F. #2 DNA 5

 

 

 

Record the distance each ladder band moved from the well in mm along with the size of the DNA fragments in that band in bp units, based on the bp given in step 19 , in your Lab Notes.

 

Lane 1:

 

1,000 bp 34 mm

900 bp 36 mm

800 bp 38 mm

700 bp 40 mm

600 bp 43 mm

500 bp 47 mm

400 bp 51 mm

300 bp 56 mm

250 bp 60 mm

200 bp 64 mm

150 bp 69 mm

100 bp 77 mm

50 bp 90 mm

 

 

Lane 2:

 

37 mm 850bp

59 mm 265bp

 

 

Lane 3:

 

37 mm 850bp

44 mm 575bp

 

Lane 4:

 

41 mm 670bp

43 mm 600bp

 

Lane 5:

 

44 mm 575bp

 

55 mm 320bp

 Experiment: Agarose Gel Electrophoresis of DNA FragmentsLab ResultsList the distances traveled in mm for the bands in the DNA ladder in the table below.
Remember, smaller fragments travel farther than longer ones, so the top-most band will be the 1,000 bp sized DNA fragments whereas the bottom-most band will be the 50 bp sized DNA fragments.

 DNA LadderBandDistance (mm)50 bp 90 mm100 bp 77 mm150 bp 69 mm200 bp 64 mm250 bp 60 mm300 bp 56 mm400 bp 51 mm500 bp 47 mm600 bp43 mm 700 bp40 mm 800 bp38 mm 900 bp36 mm 1,000 bp34 mm 

 Whose sample had the approximately 570 bp and 320 bp sized DNA fragments? A.F. #2What were the sizes of the DNA fragments for alleged father #1? 

41 mm 670bp

43 mm 600bp Data AnalysisWhich size DNA fragment did the child inherit from her mother? 37 mm 850bpWhich alleged father, if any, can be definitively ruled out as the child’s biological father? A.F. #2ConclusionsHow are new molecules of DNA synthesized in living cells? What is the function of DNA? 

DNA has genetic information that controls our cells. So, DNA is like a blueprint that shows how to construct components of cells like proteins and ribonucleic acid (RNA). This information is carried down to newer generations through inheritance.If each individual has such a small amount of DNA in their cells, how do the bands on the gel contain enough DNA to be visible?  In order to make DNA visible. The Gel has to be soaked in a dye (ethidium bromide) to bind with the DNA and rinsed off after. Ethidium bromide helps to make DNA visible by glowing brightly in UV rays.Humans only have a few eye colors and only four ABO-based blood types. How can DNA tests definitively identify individuals when many people have brown eyes or type A blood? Suppose a suspicious hair was found in a victim’s home. A gel is set up with the DNA fragments of two suspected criminals in lanes 4 and 5, the DNA fragments of the suspicious hair in lane 3, and the victim’s DNA fragments, as a negative control, are in lane 2. A DNA ladder is in lane 1. The resulting gel is below. Which suspect, if any, committed the crime? Explain your answer.

 Lane 4,5 (two suspected criniminals)