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A scientist observed a skin cell and a muscle cell under an electron microscope. He noted that the muscle cell has more mitochondria than the skin cell. What can be concluded from this?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
Why is only one variable tested at a time during a scientific investigation?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
When should scientists revise their conclusions?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
A researcher discovers new evidence that does not support his original conclusion of a five-year scientific investigation. What should the researcher do next?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
If Megan is asked to determine the density of a small irregular object, which two scientific tools would she use to determine its density?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
A student performs several tests on two cells and concludes that one of the cells is a plant cell and the other is an animal cell. What observation did the student make to justify that conclusion?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
Why is a vaccine not the perfect solution for common viral illnesses such as the flu or the cold?
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
Many scientists accept the theory that excess carbon dioxide emissions from cars and industry form a layer of gas in the upper atmosphere that traps heat. The result is an increase in the average temperature on Earth. Which observation supports this
to get reliable and accurate results
One cell had a cell wall, and the other did not.
Revise his study to incorporate the new evidence and retest.
Viruses change and mutate at such a high rate that vaccines could not be manufactured quickly enough to keep up with the chan
Muscle cells are more active than skin cells.
graduated cylinder and a scale
when new evidence is found that does not support the conclusion
Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface.
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