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alex41 [277]
4 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]4 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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Through this concept separate branches of government have the power to prevent actions by other government branches. In represen
lilavasa [31]

1

Answer:

This is the concept of separation of powers.

Explanation:

The separation of powers is a concept created by Montesquieu that determines that the system of government of a nation must be governed by three different powers (executive, legislative and judiciary powers) that represent branches separate from the governmental system, in addition to monitoring each other, preventing the abuse of power and the concentration of power in just one branch of government.

In summary, the separation of powers allows separate branches of government to prevent actions by other branches of government. In representative democracy, checks and balances help to restrict powers between different branches.

4 0
3 years ago
Explain 1 positive and 1 negative effect form the arrival of Columbus in the Americas.
Veseljchak [2.6K]

Answer:

The positive effect is the exchange that happened between the Old and New World, and the negative effect are the diseases that Europeans brought to America that killed millions of Natives.

Explanation:

After Columbus discovered new continent many products that were unknown to people on one or other continent were exchanged. That was probably the most positive consequence of the Columbus discovery.

On the other side, diseases such as smallpox killed millions of Natives, which together with conquistadores led to extinction of certain tribes.

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3 years ago
Which of the following statements BEST describes the governments of Kenya and Nigeria?
Gala2k [10]

Answer:

A I think

Explanation:

6 0
3 years ago
Farming is a primary economic activity of traditional economies<br><br> TRUE <br> FALSE
vovangra [49]

The answer is true

<u><em>Traditional economies are often based on one or a few of agriculture, hunting, fishing, and gathering.</em></u>

3 0
3 years ago
Read 2 more answers
)How did British philosopher Thomas Hobbes' belief that people are selfish by nature help shape the Enlightenment?. . Hobbes's i
djyliett [7]

Answer:

Enlightenment thinkers sought to create governments that would limit human self-centeredness

Explanation:

  • The belief that Thomas Hobbes proposed help change the peoples views on many aspects in the society among them being the political aspect.
  • More non-human oriented leadership proposals came as a result of this idea. The bureaucratic structure is a good example of inhumane governance.
  • Since human beings were selfish by nature, as per Hobbes, then, the people could not have the selfish being lead them and be the custodian of their assets, they had to make a government which would limit human self-centredness.
6 0
3 years ago
Read 2 more answers
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