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Effectus [21]
3 years ago
10

3. Which statement best describes the Richter scale? A. It's a test given to all geologists. B. It's a numerical system that mea

sures the smallest seismic waves during an earthquake. C. It's a numerical rating system that measures the largest seismic waves during an earthquake. D. It's named after a scientist who studied tornadoes.
Biology
1 answer:
valina [46]3 years ago
7 0
The answer is B.  because Richter's scale is <span>a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. </span>
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How many significant digits are in the measurement below?
Pie

Answer:

Non-zero digits are always significant. Any zeros between two non-zero digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.

Explanation:

5 0
2 years ago
A ____ is an agent that can cause infections and diseases.
Darina [25.2K]

<em>A </em><em>virus </em><em>is an agent that causes infections and diseases. </em>

<h2>Further Explanation </h2>

Viruses are microscopic parasites that infect cells of biological organisms. Viruses are obligate parasites, this is because viruses can only reproduce in living material by invading and utilizing the cells of living things because viruses do not have cellular equipment to reproduce themselves.

The term virus usually refers to particles that infect eukaryote cells (multicellular organisms and many types of single-cell organisms), while the term bacteriophage or phage is used for types that attack types of prokaryotic cells (bacteria and other organisms that do not cell nucleated).

The virus has been infecting since the days before Christ, this is evidenced by the existence of several discoveries, namely reports of virus infections in hieroglyphics in Memphis, the capital of ancient Egypt (1400 BC) which shows the existence of poliomyelitis. In addition, King Pharaoh Ramses V died in 1196 BC and is believed to have died of the smallpox virus.

In 1880, Louis Pasteur and Robert Koch put forward a "germ theory" namely that microorganisms are the cause of disease. At that time also the famous Koch Postulate which is very well known today, namely:

  • A disease agent must be present in every case of the disease
  • The agent must be isolated from the host and can be grown in vitro
  • When the muri agent culture is inoculated into susceptible healthy host cells, it can cause disease
  • The same agent can be taken and re-isolated from the infected host

<h3>Various kinds of viral infections </h3>
  • Acute infections are infections that last for a short time but can also be fatal.
  • Chronic infection is a prolonged viral infection so there is a risk of symptoms of the disease coming back.

Learn More

Viruses brainly.com/question/11690598

The infection by virus brainly.com/question/8633233

Details

Class: Middle School

Subject: Biology

Keywords: viruses, disease, infection

8 0
3 years ago
Read 2 more answers
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malfutka [58]

Answer:

A

Explanation:

An isolated system can NOT exchange energy or matter with it's surroundings. This is why it is isolated.

7 0
3 years ago
One example of scientists taking different approaches that lead to the same result is
insens350 [35]
Two scientists testing different hypotheses about the same question
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3 years ago
Which of the following events can result in inheritable genetic variations in organisms
Svetlanka [38]

The right answer is B.

The answer B is the only proposition which specified at which stage the event must occur, in fact, the meiosis.

Meiosis is a characteristic division of reproductive cells that can generate gametes to form new species (desendence). So if a mutation occurs at this time (such as recombinations) it will inevitably be inherited.

3 0
3 years ago
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