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3 years ago

The animalia, plantae, and Protista are

1 answer:

3 0

Answer: The Animalia, Plantae, and Protista are kingdoms. Kingdoms are a category for Plants, Animals, Protists, Fungi, Archaebacteria, Eubacteria. The members of this kingdom, contains all the plants which includes flowering plants, mosses, and ferns. These are broad classification categories which are used in biology.

Explanation:

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Proteins in the body are formed from twenty amino acids. a. True b. False

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True!
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Examination of the penis, testicles, vagina, and the mammary glands is performed during the ____ system of the systematic examin

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Examination of the penis, testicles, vagina, and the mammary glands is performed during the urogenital system of the systematic examination.
The urogenital system of the human body contains the organs concerned with reproduction and urinary excretion.

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Explain why the process of industrialization is called a revolution

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Answer:

Industrialization and revolution are the same because they bring a positive sudden change into the society.

Explanation:

A sudden change in the society meant to be a major result of revolution. This also goes along with industrialization, because the more there are creation of industries, the more the will be increase in employment rate and production of foods, which will eventually raise the standard of living of the people in the society.

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3 years ago

The bones from an animal found at an archaeological dig have a C614 activity of 0.10 Bq per gram of carbon. The half-life of C61

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C14 is an isotope used in radiocarbon dating techniques to date organic matter remains. The age of these bones is approximately 6890 years.

<h3>What is Carbon 14?</h3>

Carbon 14, also known as radiocarbon, is a radioactive carbon isotope.

Isotopes are the atoms of the same element -carbon- that vary in neutrons and, hence, in their massic number. They are alternative forms of the same element.

The radioactive C14 nucleus contains 6 protons and 8 neutrons and has a half-life of 5730 years.

The term half-life is a reference. It means that an organism that has been dead for 5730 years has half the C14 amount or concentration than the same organism had when it was alive.

Knowing the half-life of an element is useful to determine the age of the dead matter.

C14 is used in radiocarbon dating techniques or methods to estimate the age of fossils. This is a reliable technique used for dating organic samples that are less than 50,000 years old.

Available data:

The half-life of C14 is 5730 years
Bones activity of 0.10 Bq per gram of carbon

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

C14 T₀ ⇒ Amount of carbon in a living body. We know, by bibliography, that living organism activity is 0.23 Bq per gram of carbon. So, C14 T₀ = 0.23 Bq/g

C14T₁ ⇒ Amount of carbon in the dead body. C14T₁ = 0.1 Bq/g

λ ⇒ radioactive decay constant = (Ln2)/T₀,₅

T₀,₅ ⇒ The half-life of carbon 14 = 5730 years

T₀ = Time when the organism was alive

T₁ = Age of bones

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5730

λ = 0.0001209

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (0.1/0.23) = Ln 0.4347 = - 0.833

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 0.833 = - 0.0001209 x T₁

T₁ = - 0.833 / - 0.0001209

T₁ = 6889.99 ≅ 6890 years

The bones are approximately 6890 years.

You can learn more about dating organic matter with carbon14 at

brainly.com/question/4149380

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2 years ago

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Inessa05 [86]

Answer:

A scientist's response to the increase in food poisoning sick patients should be examining the type and source within the foods consumed.

Explanation:

Food poisoning involves the effects that decomposed or contaminated food can have on a group of people who eat it, and can cause illness in all or most individuals.

Although patients' symptoms should be treated and preventive education provided, the best course of action for a scientist is to investigate the cause.

The response of a scientist to the increase in food poisoning cases is to determine the type and source of food, as well as the nature of the alteration it has -decomposition, contamination, bacteria- in order to eliminate the source and avoid new cases.

The other options may be valid in the face of the appearance of food poisoning cases, but they are not the best procedure with which a scientist would respond.

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2 years ago