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Leya [2.2K]
3 years ago
5

Why are radio waves not used to generate medical images

Biology
1 answer:
Bogdan [553]3 years ago
8 0
We generally use x-rays because x-rays of the right energy will be absorbed by material passing through them. Radio waves will generally pass straight through with only minor interaction, unless it’s a conductive surface
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In radioactive dating, scientists determine the age of a fossil by
Lorico [155]
Scientists establish the age of a rock or fossil based on natural radioactive decay and certain elements such as potassium and carbon, this is used to make reliable “clocks” to date ancient events.
(Sorry if not all is accurate hope it helps)
6 0
2 years ago
Describe the means by which Hershey and Chase established that only the DNA of a phage enters an E. coli cell. What conclusions
ASHA 777 [7]

Answer:

Harshey and chase labeled T2 bacteriophage with radioactive sulfur and radioactive phosphorus. As DNA contains phosphorus, not protein and protein contain sulfur, not phosphorus, therefore, the presence of radioactivity in cell can determine which is the genetic material .

Then Harshey and Chase infected <em>E.coli</em> with T2 bacteriophage and centrifuged the cell. They found radioactive phosphorus in cell pellet and radioactive sulfur in supernatant.

So by this experiment, they concluded and proved that DNA is the genetic material that gets transfer from one generation to another.

6 0
3 years ago
What was the scandal committed by the
astraxan [27]

Given what we know, we can confirm that the scandal committed by the Secretary of the Interior who worked under President Taft was that he sold Alaskan coal lands that were supposed to be national parks.

<h3>Why is this important?</h3>

National parks are the way in which the government can preserve lands and protect the conservation of the organisms that inhabit those lands. The selling of these lands marked a major scandal at the time as they were considered shady dealings, shrouded in secrecy, that undermine conservative efforts.

Therefore, we can confirm that the answer is C, as he sold the Alaskan coal lands that were supposed to be protected national parks.

To learn more about national parks visit;

brainly.com/question/2510693?referrer=searchResults

4 0
2 years ago
which scientist theory did redi and pasteur's experiments refute? a.the theory of evolution b.the theory of spontaneous generati
Neporo4naja [7]
I believe it was the Cell theory. :)
3 0
3 years ago
A fruit fly has diploid cells with 8 chromosomes. Explain how many chromosomes are in its haploid gametes
Y_Kistochka [10]

Answer:

4

Explanation:

Diploid means 2n

Haploid means n

Here we have 2n=8 (because fruit fly has diploid cells with 8 chromosomes) to get to n which is haploid divide by 2, you get n=4

8 0
3 years ago
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