A researcher conducted an experiment to test whether exposure to high levels of UV radiation (that seen when ozone depletion is at its peak) harms human skin cells. He exposed human skin cells growing in Petri dishes to this level of UV radiation and determined the percentage of cells in each dish that died. He found that 30% of the cells died after 3 days of exposure to high UV radiation exposure. Why would it be unreasonable to conclude that this level of UV radiation exposure is harmful to these cells?

Answers

Answer 1

Answer:

It be unreasonable to conclude that this level of UV radiation exposure is harmful to these cells because, There is no control group and we don't know how many cells would have died after 3 days with normal UV exposure.

Explanation:

The researcher in the given example shows the effect of UV radiation and its effects to the cells. He does not tell about the group that did not receive the UV radiation and their effects. A control group is very important in a research because it can be compared with the result obtained by some experiment effects. It is a group in an experiment in which the treatment is not given.

The results can be compared with the group under treatment with the group that did not undergo any treatment. Since, there is no control group in this experiment, we can not determine how many cells that were exposed to normal UV radiation died after 3 days, it would be unreasonable for getting the conclusion of how harmful UV radiation exposure to these cells.

Related Questions

Which of the following does not accurately describe fruits?a. Fruits develop from ovary walls. b. Fruits attract animals, which helps disperse seeds. c. Fruits provide nourishment for seedlings. d. Fruits are rich in sugars.
The process of maintaining a _________ internal environment despite changes in the external environment is known as ________.
The vultures do not have hair on their heads? explain
The gametophyte is much larger than the sporophyte in all of the following excepta. mosses. b. liverworts. c. pine trees. d. horsetails.
Why might a scientist repeat an experiment if he/she didn't make a mistake in the first one? An experiment should be repeated toA) increase income for increased work. B) prove how good of a scientist you are. C) double check your results. D) show how smart you are.

Where do polar bears live

Answers

Polar bears are mammals with big paws and thick, clear fur. Polar bears live on the ice of the Arctic coasts. The use their webbed front paws to swim in the cold water.

Hey There! Polar bears love in countries that ring the arctic circle. Have A Brainly Day!

If an outdoor runner develops a headache, feels tired, and has an elevated heart rate, what is the most probable cause?A. Insufficient calories
B. Overhydration
C. Dehydration
D. Lack of protein

Answers

The most probably cause would be dehydration because headaches and drowsiness are symptoms of it.

What is the process in the illustration called

Answers

the answer is B. telophase

listed following are events or phenomena that occur during either the part of the sunspot cycle known as solar minimum or the part known as solar maximum. match these items to the correct part of the sunspot cycle.

Answers

The correct answer for the question that is being presented above is this one:
Below is the arranged match of the items of the sunspot cycle.
Solar Maximum
(1) Occurs about 11 years after a solar maximum (on average)
(2) solar flares are most common
(3) auroras are most likely in Earth's skies
(4) orbiting satellites are most at risk
(5) sunspots are most numerous on the Sun

Solar Minimum:
(1) Occurs about 5 to 6 years after a solar maximum (on average)

What is the significance of flatworms being flat?

Answers

Flatworms (Platyhelminthes) are phylum of unsegmented, soft, flat invertebrates.

Flatworms have no body cavity which is why they are flat. The advantage of a flat body is facilitated respiration and circulation. Flatworms do not have respiration and circulation system. But, oxygen diffuses across the skin and reach all parts of the body thanks to a flattened shape. Also, it is easy to hide from predators because they can get almost everywhere thanks to the body shape.

Which is an advantage of genetic engineering?

Answers

Great minds combined with technological advancements have a lead to creations and achievements that would have been impossible. Whatever great scientist of the past has achieved have already been surpassed or improved through modern and innovative ideas and processes. An excellent example of which is the direct manipulation of an organism’s DNA, also known as genetic engineering or genetic modification (GM). Coming from the terms genes and modify, the entire process is something out of a science fiction movie. Well, it used to be that way until the practice was perfected and used in actual applications. Genetic engineering made it possible to add new DNA or alter bad ones.

Other Questions

Why is it important to look at serving size

What are stem cells and how are they being used?

A scientist thinks he has discovered a drug that interferes with the functioning of a virus in the human body. To effectively block infection, the drug can

Down’s syndrome results from people having an extra copy of chromosome 21 in their cells as shown here. People with Down’s syndrome have both a lower IQ and a shorter life expectancy than those without Down’s syndrome. This is an example of