A nursing student is considering working for a pediatric endocrinologist after graduation and is concerned about her ability to gain sufficient knowledge to respond to questions from patients and their parents about various metabolic disorders. What could the student do to acquire more knowledge in this field, and what will the student discover in terms of the role of the endocrine system?
In: Biology
Post your original "primary post" of at least 125 words for one of the following three bulleted items. Also, reply to a fellow student on any topic.
(1) Trophic Cascades in theSerengeti. Watch Dr. Cox's video on "What Rinderpest eradication taught us about the Serengeti", which can be found in the Instructor Insights folder for this week. Then address the following questions: (a) How did eradication of Rinderpest from East Africa increase both the tree and giraffe populations in the Serengeti? (b) How did eradication of Rinderpest from East Africa increase the population of predator species in the Serengeti? (c) What does this tell us about ecosystems?
(2) Biomes. The term "biome" is described in the textbook. For this topic, describe the biome where you grew up (or where you currently live). Identify your location, the biome of the region, and describe the major characteristics of that biome. Add enough detail and commentary from your own experience, so that your answer is 125 words or more. If you're really ambitious, you could consider looking up the "ecoregion". The EPA maintains information about that.
(3) Shrinking Red Knots. Read two of the following three articles: Briggs (2016); Dussault (2016); Zimmer (2016). (A) In your own words summarize the basic story that the articles have in common. (B) Of the two articles you read, which of them do you prefer? Why?
In: Biology
When looking at data on average life expectancy in different developed countries, the average life expectancy in the United States is significantly lower than that of many other developed countries. What are three factors that contribute to this lower life expectancy, and how are they related to each other? What is a realistic way to help reduce these problems?
In: Biology
In: Biology
answer the following questions
1 what are the six keys that determine the RUG three
groupers.
2 what are the three components that together reflect
the cost of the particular procedure
3 what are the major categories of suppliers of the hco?
4 what are the four major payment method unit that are used in the healthcare
In: Biology
human growth hormone (HGH) has been taken by athletes to gain a competitive advantage. This protein is also found naturally. Assuming that blood contains HGH, describe a test that could be developed to test large numbers of athletes in a short period of time and describe one that would not be as feasible. Briefly explain your choices.
In: Biology
In: Biology
1. If all cell types have the exact same genome, how can they be different from one another?
2. do you think transcription through introns is sufficient to explain transcription of 75% of the genome? Why or why not?
In: Biology
In: Biology
In detail describe the function of centrosomes in mitosis as well as how extra centrosomes are able to cause aneuploidy.
In: Biology
Part A: What is the probability of producing and F1 offspring that phenotypically resemble either parent from the cross?
AaBbCC x aabbCc
Note: Assume that capital letters represent completely dominant alleles.
Part B: Same cross. But in this case the alleles are incompletely dominant. What is the probability of producing and F1 offspring that phenotypically resemble either parent from the cross?
In: Biology
Experiment 2 – Light Independent Reaction
After the light dependent reaction, the light independent takes place. During this phase, also known as the Calvin Cycle, the energy generated in the light independent phase is used to fixate the carbon atoms from carbon dioxide and glucose is produced.
In this experiment you will use baby spinach leaves to demonstrate the utilization of carbon dioxide during the light independent reaction of photosynthesis. Phenol red is an organic dye that undergoes a color change according to pH . The color of this compound will appear as follows:
Because phenol red can be used to detect changes in pH, it can also be used as an indirect method of detecting changes in the amount of CO2 dissolved in a solution. When CO2 is added to a solution, some of it reacts with water to produce an acid called carbonic acid. In turn, some of the carbonic acid dissociates to increase the [H+] in the solution. Therefore, if the amount of CO2 in a solution is increased, the [H+] increases (pH is lowered) and the solution becomes more acidic. It also follows that if the amount of CO2 in a solution is lowered (e.g., by removal of CO2 from the solution), the [H+] will decrease (pH increases) and the solution becomes more basic. The chemical reactions involved are shown below.
To detect the process of carbon fixation (CO2 reduction), you will use this pH indicator to detect changes in the CO2 level.
Materials
Fresh spinach leaves
2 glass test tubes
2 - 250 ml beakers
Phenol red solution
Permanent marker or wax pencil
Water *
Sunshine or bright light source *
Stopwatch/timer
Metric ruler
Procedure
Add 20 ml of phenol red solution to 2 glass test tubes.
With your straw , blow bubbles over the top of the solution until it turns yellow. The color change occurs when the water in the phenol red solution and the CO2 are combined forming carbonic acid . Make sure that both tubes are the same shade of yellow.
Add a small leaf of baby spinach to tube 2 only
Place the 2 test tubes into sunshine or a bright light at time for 2 hours.
Record the color every ½ hour.
Table 2: Change is Color (phenol red) |
|||||
0 time |
½ hour |
1 hours |
1 ½ hours |
2 hours |
|
Tube 1 |
|||||
Tube 2 |
Questions
What is the independent variable in this experiment?
What is the dependent variable in this experiment?
What happened to the color of the solution over time?
What is the process that is occurring to make the phenol red solution change colors?
What is the function of the following components in the process of photosynthesis (this may differ than how this compounds were used in the experiment)
CO2:
Light:
H2O:
O2:
Chloroplasts:
In: Biology
In: Biology
Would you be more likely to find single nucleotide polymorphism in the protein-coding or in the noncoding dna of the human genome? Please explain, I do not understand the key.
In: Biology
True or false One of the most important principles governing an ecosystem is that the inputs to the ecosystem are equal to the outputs
In: Biology