Admin Table of Contents [hide]
- 1 Why is it important to include a control group whenever possible in an experiment?
- 2 What is Anna’s manner of death?
- 3 How do you use the Glaister equation?
- 4 Why is determining the physiological time of death often difficult Pltw?
- 5 How old was Anna Garcia when she died Pltw?
- 6 Was Anna Garcia’s death an accident?
- 7 Why is extracting DNA from plant cells more difficult than animal cells?
- 8 How cold is a dead person?
- 9 What are controlled variables in an experiment?
- 10 What is the extraneous variable in an experiment?
Why is it important to include a control group whenever possible in an experiment?
Why is it important to include a control group whenever possible in an experiment? You have to include a control group whenever possible in an experiment so that you can compare your results. This would make the experiement go faster and the results more accurate.
What is Anna’s manner of death?
Manner of Death Anna Garcia died of a stroke. Blockages in the internal carotid artery in the heart and in the middle cerebral artery of the brain cut off oxygen supply to her brain, causing a stroke on the right side of her brain.
How do you use the Glaister equation?
The Glaister Equation calculates the hours passing after death as a linear function of the body temperature taken of the decedent. The equation is (98.7 degrees Fahrenheit – the body temperature of the decedent) / (1.5 degrees/hour) = PMI.
Why did the DNA isolation protocol differ for the plant and animal cells?
Why did the DNA isolation protocol differ for the plant and animal cells? Plant cells have a cell wall so we have to dissolve the cell wall(with the extraction buffer) to get to the DNA unlike the animal cells. The restriction enzymes cut the DNA and number the pieces that result.
How does ambient temperature affect Algor mortis?
Algor mortis, the cooling of the body postmortem, is the result of a cessation in thermoregulation. Thus the body temperature will begin to change toward the ambient temperature of the room or surroundings in which the remains are found.
Why is determining the physiological time of death often difficult Pltw?
Body temperature typically reaches the temperature of the surrounding environment within 24 hours of death. External factors, such as room or air temperature, exposure to sun, wind, or snow, or the clothes a person is wearing impact this estimate and can make it challenging to pinpoint an exact time of death.
How old was Anna Garcia when she died Pltw?
38-year old
Students researched liver disease while preparing to identify the cause of death. On August 14, students at Westerville North High School walked into a fictional crime scene at the home of 38-year old Anna Garcia.
Was Anna Garcia’s death an accident?
Conclusion. Anna Garcia’s death was an accident. She fainted and hit her head on the table, causing her death.
What affect does the outside temp have on your time of death estimation?
What effect, if any, do the outside temperatures have on your estimation of time of death? The outside temperature has no effect on larval development.
Why is it more challenging to extract DNA from plant cells than animal cells?
Plant genomic DNA is more difficult to extract because of the plant’s cell wall. In addition, the metabolites present in the plant cell may interfere with genomic DNA extraction by contaminating the DNA sample during the precipitation process.
Why is extracting DNA from plant cells more difficult than animal cells?
Maintaining yield and quality of DNA during plant DNA extraction is one of the difficult tasks compared to that of animals, because of its rigid cell wall, which is made up of cellulose along with other variable levels of chemical components such as polysaccharides, polyphenols, proteins, and lipids that act as a …
How cold is a dead person?
The average living human being has a body temperature of 98.6 degrees F. However when a person dies, their body begins to cool, at a rate of about 1-2 degrees every hour. Eventually, the body’s temperature will equal the room’s ambient temperature.
What are controlled variables in an experiment?
The controlled variables (or constant variables) are factors that the scientist wants to remain constant if the experiment is to show accurate results. To be able to measure results, each of the variables must be able to be measured.
How does the experimental design affect the participant variables?
The experimental design chosen can have an affect on participant variables. Situational variables also include order effects that can be controlled using counterbalancing, such as giving half the participants condition ‘A’ first, while the other half get condition ‘B’ first.
What is the independent and dependent variable in this experiment?
The independent variable is that one plant is getting watered (1 cup of water) every day and one plant is getting watered (1 cup of water) once a week. The dependent variables are the changes in the two plants that the scientist observes over time. Can you describe the dependent variable that may result from this experiment?
What is the extraneous variable in an experiment?
Extraneous Variable. When we conduct experiments there are other variables that can affect our results, if we do not control them. Extraneous variables are all variables, which are not the independent variable, but could affect the results of the experiment.
https://www.youtube.com/watch?v=haMjNc6amSU