Category: Biology

Discuss how the findings of Louis Pasteur may have inspired Joseph Lister’s development of aseptic techniques in surgical settings. Be sure to mention the following in context of Lister’s findings: Spontaneous Generation and Germ Theory. In addition discuss how the understanding of germ theory has been applied in the development of medical microbiology. (Section 1.6 in the textbook)
Discuss the term ubiquitous, evaluating why it is an appropriate term to use to describe microbes and their importance (Section 1.2 in textbook). Include the following in your response and provide examples:
the importance of microorganisms in shaping the environment (Section 1.2 in the textbook)
their use in biotechnology (Section 1.3 in the textbook).
You are a scientist researching West Nile virus, a mosquito-borne pathogen. You note that a number of cases of West Nile disease in your county skyrocketed to their highest levels ever this past summer, which also was the wettest summer in 100 years. Using the scientific method develop a sound hypothesis explaining the increase in disease cases last summer and design a method for testing this hypothesis. (Section 1.6 in the textbook)
Draw a phylogenetic tree that shows the evolutionary relationships between the domains bacteria, archaeans, and eukaryotes. You only need to include the three domain names in your diagram. Then answer the following question: What molecular evidence supports your drawing? Then discuss how molecular evidence is advantageous over relying on structural similarities to accurately classify species Provide specific details to support your answer. Be sure to read Section 1.7 in the textbook over the Universal Tree of Life. Videos have been provided below demonstrating how to add a drawing to a Word document and a Google Doc.
Differentiate the following chemical bonds: ionic, polar covalent, nonpolar covalent, and hydrogen. Be sure to mention the following where appropriate: anion, cation, and electronegativity of covalent molecules. (Section 2.1 in the textbook)

Create a six page comic with at least 10 panels to show the relationship between 2-4 organ systems. Your comic can be informative, or you can try to tell a story with characters and a plot. Explain your artistic choices in writing or a video.
 
Include the following:
comic icon.png
A cover page (counts as one of your six pages)
A back cover (counts as one of your six pages)
10 panels with frames surrounded by gutters
Text 
Caption(s) 
Sound effect(s)
Speech bubble(s)
Thought bubble(s)
At least three different panel transitions
Movement-to-Movement
Action-to-Action
Subject -to-Subject
Scene-to-Scene
Aspect-to-Aspect
Non-Sequitur
Write a one page, double spaced explanation of the artist choices you made to create your comic or create a three to five minute video explaining your artistic choices. Consider using these questions to help you brainstorm your response. 
How did you use visuals to communicate ideas instead of relying on text? 
Which panels did you add text to and why? 
How do the shape of your panels help the view understand the relationship between the body systems?
How did you use color to help the reader understand the relationship between the body systems? 
Which panel transitions did you use to help the reader understand the relationship between the body systems? 

Statement 1- ctenophores are exclusively marine, radially symmetrical,diploblastic organisms
Statement2- bioluminescence is well marked in ctenophores

Summaries (summarize in your own words the main points of the assigned reading)
2. Reflections (reflect on relevance of readings to your own life, personal experiences, internal and
external class discussions, etc.)
, Dr. Tatiana’s is split into 3 parts (NOT CHAPTERS), so a 300-450 word summary is needed for each part. 
, Dr. Tatiana’s is split into 3 parts (NOT CHAPTERS), so a 500-700 word reflection is needed for each part.

i need someone, specialize in ekg strips who can identify rate, pr interval, qrs interval, qt interval, rhytm and interpretation.

Ask a question about the current topic you may be struggling with. If you have mastered the material and have no questions, choose a current topic, explain it, and describe what learning techniques you used to master the material. Support your post with credible scientific source(s)
attached is the topic I am struggling with

1.      
Bats and humans are both mammals and share a
common ancestor. Because of this, a human arm and a bat wing have similar bone
structure. In contrast, bird wings and bat wings have different structures.
Explain these relationships in terms of homologous and analogous structures.
2.      
The Channel Islands are a series of small
islands off the California coast. Each island has a genetically distinct population
of foxes. Compare the population of foxes on one of these islands to the
population of foxes in the forests of mainland California. Which is more likely
to be impacted by genetic drift? Which is more likely to be at Hardy-Weinberg
equilibrium?
3.      
Living organisms are commonly divided into six
kingdoms: archaea, bacteria, fungi, protists, plants, and animals. What’s the
biggest problem with classifying organisms in this way?
4.      
a.      
How do radioactive elements help scientists
establish how old rocks and fossils are?
b.      
How do index fossils help scientists establish
how old rocks and other fossils are? In your answer, include fossils in the
same layer of rock, in a lower layer of rock, and in a higher layer of rock
compared to an index fossil.
5.      
Compare and contrast the lytic and lysogenic
life cycles of viruses. How does the virus reproduce in each of these life
cycles? What happens to the host cell in each of these life cycles?
6.      
Seeds are one way that plants reproduce.
a.      
What are the reproductive advantages of using
seeds to reproduce?
b.      
What are the two major divisions of seed plants,
and how do plants in each of these divisions reproduce?
7.      
How is water transported into and through a
plant? In your answer, describe the processes that move water into three
different structures of a plant.
8.      
Describe two ways that plants respond to their environment,
giving an example of each. Your answer can include ways that plants respond to
seasonal changes, light, gravity, or touch.
9.      
Define radial
symmetry, bilateral symmetry, and asymmetry
in animals. Provide an example of an animal with each body plan. To which of
these categories to humans belong?
10.  
Compare and contrast respiration in fish and in humans.
What is the goal of respiration? How is this goal accomplished?
11.  
Differentiate between mechanical and chemical
digestion. Where do each of these types of digestion take place?
12.  
Describe the structure of a neuron. Include the
cell body, dendrites, and axon in your description. How does the structure of a
neuron help it carry out its function efficiently?
13.  
What are osteoblasts and osteoclasts? Describe
how these cells work together in a healthy person. What can occur if these
processes are unbalanced?
14.  
Humans have one of four blood types: A, B, AB,
or O. Explain what determines a person’s blood type. What antigens are on the
blood cells in a person with each of these blood types? What antibodies are in
the blood of a person with each of these blood types?
15.  
Compare and contrast exocrine and endocrine
glands. Provide an example of an exocrine gland, an exocrine secretion, an
endocrine gland, and an endocrine secretion.

Write a 750-1,000-word essay about water quality in your community that addresses the following points:
Obtain a water quality report from your local municipality within the last two years and discuss what you found in the report. 
Identify a water quality issue happening in your community and where the pollution comes from. This includes point sources (for example, water discharge from a factory; contamination from a Superfund site), non-point sources (for example, agricultural runoff), and natural sources.
Describe how the pollution source is impacting the environment and human health in your community, and provide two examples of each.
Identify three management practices to minimize water pollution.
Remember to support your data and information with appropriate citations. A minimum of five peer-reviewed references must be included.
Prepare this assignment according to the guidelines found in the APA Style Guide, located in the Student Success Center.
This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.
You are required to submit this assignment to LopesWrite. A link to the LopesWrite technical support articles is located in Class Resources if you need assistance.

Describe the external function of a leaf
Describe the internal function of a leaf
Photosynthesis and the leaf
Fall coloration and wilting
**i will attach the format in which it should be written

answer question Please check for plagarims  
A student observes that she’s always sleepy shortly after eating lunch, and she wants to be able
to pay better attention in her mid-afternoon class. She tried doing 10 jumping jacks just before
the class, but still felt sleepy around the middle of the class. The next day, she tried sipping
water throughout the class and found that she could pay attention until the end of the class. The
student now brings a water bottle to class.
Identify how this student applied the scientific method to solve her problem.
2. The model of electrons orbiting around the nucleus like planets orbit the sun has been proven to
be inaccurate. What’s a more accurate way to describe electron orbitals?
3. How do covalent bonds differ from ionic bonds? Describe how each of these bonds is formed.
4. Natural cycles circulate several resources. Describe the water cycle. What happens to water at
each stage of the cycle, and what drives this cycle?
5. Toxoplasma is a protist that must infect cats to be able to reproduce. The infection doesn’t
benefit cats and only rarely harms them. What type of symbiotic relationship is this, and why?
6. Compare and contrast the location and function of ribosomes in prokaryotic and eukaryotic
cells.
7. Describe the structure of the plasma membrane. What structures are on the side of the
membrane facing the environment, the side of the membrane facing the cell, and the inside of
the membrane?
8. Compare and contrast aerobic and anaerobic respiration. Which process yields more ATP?
What’s the final electron acceptor in each process?
9. Compare and contrast meiosis and mitosis. How many daughter cells are produced by each, and
how many chromosomes do they have? In what contexts do meiosis and mitosis occur?
10. Explain why cell cycle regulators are critical to the health of an organism. What can happen if
cell division is allowed to proceed without being regulated?
11. A person without the allele for sickle cell anemia has children with a person who is a carrier for
sickle cell anemia but doesn’t have the disease. What percentage of their children will have
sickle cell anemia? What percentage of their children will be carriers for sickle cell anemia?
Show your work with a Punnett square. You can copy/paste the blank table below or create a
table in the submission box to complete the Punnett square.
12. Explain how the Hershey-Chase experiment used bacteriophages with radioactive sulfur and
radioactive phosphorus to demonstrate that DNA, and not protein, is the carrier of genetic
information.
13. What are the three main types of RNA involved in gene expression? Briefly describe the role of
each of these types of RNA in gene expression.
14. Compare and contrast a frameshift mutation and a single nucleotide substitution mutation in a
DNA sequence encoding a protein. How many nucleotides would be inserted or deleted in each?
How many amino acids in the protein sequence would be altered in each?
15. Some types of muscular dystrophy are X-linked recessive disorders. A mother who is a carrier for
muscular dystrophy has children with a father who doesn’t have muscular dystrophy.
a. What percentage of their sons will have the disease, and what percentage of their sons
will be carriers?
b. What percentage of their daughters will have the disease, and what percentage of their
daughters will be carriers?
Show your work with a Punnett Square, using X
D
to represent the allele not associated with
muscular dystrophy and X
d
to represent the allele associated with muscular dystrophy. You
can copy/paste the blank table below or create a table in the submission box to complete
the Punnett square.