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olga2289 [7]
3 years ago
8

Shigella transmission can usually be prevented by which of the following?

Biology
1 answer:
Anettt [7]3 years ago
3 0

Answer:

a. Proper Handwashing

Explanation:

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A fossil bone has 25% of this new radioactive element remaining. If the half-life of this new element is 10,000 years, how old i
natali 33 [55]
The element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000

the fossil bone is 20,000 years old
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3 years ago
A muscle contracts in response to an electrical signal that signals the ______________, the unit of contraction, to shorten.
Ierofanga [76]

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Sarcomere

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A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments—actin and myosin—which are the active structures responsible for muscular contraction.

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2 years ago
How do the circulatory and respiratory systems work together to get oxygen to the body cells?
svetoff [14.1K]
When we breathe, our respiratory system takes up oxygen and carbon dioxide or other useless gases go out . The oxygen combines with the haemoglobin in the blood of the circulatory system . This is transferred to all the cells of our body to get energy.
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3 years ago
What did the Clean Air Act allow citizens to do that no previous U.S. environmental law had allowed?
OlgaM077 [116]

Answer:

The correct answer to the question: What did the Clean Air Act allow citizens to do that no previous U.S. environmental law had allowed, would be: it was the first law that considered citizen lawsuits against the correct enforcement of the statutes stated in the Act.

Explanation:

The Clean Air Act, which was passed originally in 1963, and which has been amended since, with its last update being in the 1990´s, became the first time that the U.S government not only established federal funding for environmental issues, but also regulated environmental topics through EPA (Environmental Protection Agency, 1970) and considered the power that citizens could have to ensure the enforcement of the statutes and provisions considered in the Act. This consideration of citizen suits, is the most important  and relevant difference with earlier environmental laws.

4 0
3 years ago
What system controls voluntary and involuntary life functions?
Aleksandr [31]
Your correct answer would be A. Nervous system

5 0
3 years ago
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