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alex41 [277]
3 years ago
13

A scientist suspects that food in an ecosystem may have been contaminated by radioactive nitrogen over a period of several month

s. Which of the following should be isolated from mammals living in the ecosystem and examined for radioactivity in order to test the hypothesis?
Social Studies
1 answer:
Scrat [10]3 years ago
7 0

Answer:

Hair

Explanation:

The scientist predict that the contamination occurred several months ago. Under normal circumstances, most organisms would no longer have a trace of exposure in their urine or blood after 3 months.  If the organisms exposed to the radioactive three months ago and do not come near that area again within 3 months, the scientist wouldn't be able to identify it.

But, if that substance got into their hair, it will last way longer than that. Hair Analysis is very common to be used among forensic toxicologist to identify contamination that occurred months because of this.

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Compared to members of a parliamentary system where all politicians are elected at the same time for the same term from similar-
Vladimir79 [104]

Answer:

b. Are elected or appointed for different lengths of time.

Explanation:

When compared to members of a parliamentary system who are elected at the same time and for the same term, American politicians, judges and government officers are elected or appointed for different lengths of time.

American politicians are elected for four years and can seek another term in office which will run into a total of eight years. Judges are politically appointed by the President and serve for life unless they retire, die or removed from office.

3 0
3 years ago
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-Dominant- [34]

The researcher begins with the objective in quantitative research due to the fact that it guides him in his measurements and his enquiry as he researches.

<h3>What is quantitative research?</h3>

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This type of data is usually measured and it is very different from the qualitative research.

Read more on qualitative research here: brainly.com/question/24492737

4 0
2 years ago
Case 4-2 Lisa is a student who regularly uses the computers at her local Internet café to listen to music, talk to her friends a
stira [4]

Answer: The answer is Headset

Explanation: Headsets allow people to listen to music, videos, movies and any other kind of activity that provides sound without being a disturbance for other people. Generally, in quiet public settings such as libraries, certain workplaces, and internet cafes, the use of headsets is more than mandatory.

6 0
3 years ago
What was probably the major cause of the beginning of the baby boom?
DaniilM [7]
The baby boom is also called Post-World War II baby boom, and this already reveals the cause: after the war the economy was raising again, after hard times, and people were optimistic about the future
8 0
3 years ago
In a(n) _________________________________,an artery that is near the surface of the brain or on the surface of the brain rupture
antiseptic1488 [7]

Answer:

Cerebral aneurysm (also known as intracranial aneurysm).

Explanation:

A cerebral aneurysm is a consequence of a dilatation of a brain artery. This dilatation can result in a rupture of such artery because its walls get weak during the inflammation and can therefore burst. When doing so, the blood scatter in the brain and can have serious consequences. One symptom of an intracranial aneurysm is the sudden appearance of a <em>strong headache</em>. It can also produce nausea, vision problems, and pain or weakness in an arm or leg and difficulties in understanding and speaking properly.

3 0
3 years ago
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