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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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Aging populations can be a problem for developed countries because
tester [92]

Answer: it result in high dependency ratio.

Explanation:

Ageing population is a kind of population with a high number of old people than young people in the country. it can be a problem because it can lead to a high dependency ratio in which the number of the working population will be lower than the number of people who depend on the working population. when a country has a lesser number of people that are working it has a greater economic consequences for such a country such as decrease in production, reduction in the number of tax payers.

6 0
3 years ago
Mass Media has the power to influence society and is also impacted by what’s happening in society itself.
ElenaW [278]

The above fact is absolutely true.

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  • So the answer is true.

Hope you could get an idea from here.

Doubt clarification - use comment section.

4 0
2 years ago
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One important reason that bantu speakers were successful in spreading their culture was that they?
vladimir2022 [97]

Bananas is one important reason that bantu speakers were successful in spreading their culture were introduced to Sub-Saharan Africa. This was useful because Bantu-speaking people could now migrate to places where yams did not grow easily.

The Bantu would travel in canoes across Africa's waterways and would stop at different areas to farm for some years. This can be how they spread their farming, iron working skills and language.

One of the primary sub-Saharan states in the geographic region to realize attention within the wider medieval culture world was the Ghana Empire (6-13th century CE), located in modern-day southern Mauritania and Mali.

The principal consequences of the Bantu migration, then, could also be summarized as: the spread of the Bantu and Bantu-related languages. the spread of iron-smelting and smithing technology. the spread of pottery techniques. These pioneers then shared their more advanced technologies (and, within the process, their languages) with the locals.

learn more about Bantu: brainly.com/question/5169666 \

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riadik2000 [5.3K]

According to terror management theory, to mute the defensive and anxious response that most people have when confronted with the thought of their own death, they should experience some form of: positive feedback that boosts self-esteem.

<h3>What is the terror management theory?</h3>

This is the term that is used to refer to the model that people developed that has to do with the way that people would have to offer protection to themselves against all of the concerns that has to do with death. Based on the theory, the way that people respond to the issues of death may be conscious and it could also be unconscious.

Hence we can say that  to mute the defensive and anxious response that most people have when confronted with the thought of their own death, they should experience some form of: positive feedback that boosts self-esteem.

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