1. Eggs are structured to prevent multiple sperm from fertilizing it. Discuss what those structures are and how they help prevent extra sperm from getting into the egg.
2. Explain where fertilization occurs in the female reproductive system. How does this lead to the rare ectopic pregnancy?
3. Sometimes people say that the theory of evolution says we humans came from chimpanzees .explain why this argument is flawed.
In: Biology
Why is it necessary for transformed plasmids to have a nuclear localization signal in order for them to go into the yeast nucleus?
In: Biology
Why can't a person with type B blood (recipient) receive a blood transfusion from someone with type A blood (donor)?
| the recipient's anti-B antibodies will react with the donated B antigens |
| the recipient's anti-A antibodies will bind to the A antigens of the donated blood cells |
| the recipient's anti-A and anti-B antibodies will react with the donated blood cells |
| the recipient's anti-O antibodies will bind to the O antigen of the donated blood cells |
| no reaction would occur because the B-type individual does not have antibodies |
Many tens of thousands of people who were seen as "unfit" were sterilized or killed by the Nazi regime to intentionally prevent them from reproducing. This is an example of:
| amniocentesis |
| positive natural selection |
| positive eugenics |
| negative eugenics |
| balanced polymorphism |
How is innate immunity different from adaptive immunity?
| Adaptive immunity is fast and generalized; innate immunity is slow and specific. |
| Innate immunity targets cancers and transplants; adaptive immunity targets viruses and bacteria. |
| Innate immunity is fast and generalized; adaptive immunity is slow and specific. |
| Adaptive immunity releases cytokines; innate immunity produces antibodies. |
| Innate immunity is present in fetuses and children whereas adaptive immunity is only present in adults. |
In: Biology
Put the following in order with respect to Antibody-Dependent Enhancement
Cytokine release and wide scale inflammatory response
Antibody binds weakly to epitope on pathogen
Antigenic Drift Occurs
Immune cell infection
Fc region of antibody binds to FcR on immune cell
In: Biology
capillaries and aveoli both have similar walls. How is the structure of each related to a common function?
In: Biology
Metabolite receptors bind to ___________________.
| A. |
second messengers |
|
| B. |
DNA |
|
| C. |
GPCRs |
|
| D. |
Protein Kinase A |
|
| E. |
All of the above is true. |
Animals store glucose in the form of glycogen because ___________________.
| A. |
extra energy is released when glucose is stored in glycogen. |
|
| B. |
storing glucose in glycogen does not require any energy. |
|
| C. |
storing glucose in glycogen lowers the osmolarity of the cell. |
|
| D. |
storing glucose in glycogen increases the osmolarity of the cell. |
|
| E. |
freeing glucose from glycogen converts it into fructose. |
In: Biology
In: Biology
Movie"Animal pharm:Inside transgenic and cloning 1)Chose an animal that was genetically modified and explain what they were doing to make it better.2)DO you agree with this or not?why or why not? 3)what will you propose to be done to solve the same problem that they wanted to do?
In: Biology
Ketone bodies are synthesized when__________________.
| A. |
The amount of liver citrate exceeds the amount need to generate ATP |
|
| B. |
The amount of liver oxaloacetate exceeds the amount of acetyl-coA needed for the citric acid cycle. |
|
| C. |
The amount of liver acetyl-coA exceeds the amount of available oxaloacetate. |
|
| D. |
The amount of free liver NAD+ exceeds the amount required by the citric acid cycle. |
In: Biology
This chapter discusses the different types of research design and you have read about them as well. For this entry, conduct a PubMed search and find two abstracts of studies both using a cross sectional design. The abstracts may be on any topic you chose-and they do not all have to be on the same topic. In your post, include each abstract and write about the distinguishing factors of the design used, and comment on whether or not you feel there was any other way this study could have been designed. In addition comment on next steps for the topic given the findings.
Health Epideomlogy
summarize these two articles in your own word no copying
Abstract one
https://www.ncbi.nlm.nih.gov/pubmed/30014141
Abstract Two
https://www.ncbi.nlm.nih.gov/pubmed/30015577
In: Biology
In: Biology
can an you please write Structure to function of heart
In: Biology
Question: Some bacteria have Lipopolysacchride (LPS) in their envelopes. In the case of sepsis, microbial death and lysis results in release of massive amounts of endotoxin into the circulation resulting in toxic shock syndrome. Do some research and answer the following questions:
Where specifically is LPS found in the bacteria?
Do all types of bacteria have LPS in their envelopes?
What is the chemical makeup of the LPS?
Look up Toxic Shock Syndrome. What is its effect on your physiology?
Which portion of the LPS causes toxic shock syndrome? What is endotoxin?
In: Biology
In an experiment, the hybridization method could identify quail in one of the pâté, but the PCR method could not differentiate between different pâté samples. Why? (limit 100 words)
In: Biology
Compare and Contrast the 3 big causes of mortality (infectious disease, food security and environmental issues) in Mexico and the U.S.. How and why are these countries so different in terms of these topics.
Thanks.
In: Biology