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4 years ago

Which of the following is not a possible cause of erosion? a. burrowing animals b. gravity c. water d. none of the above

Biology

2 answers:

anastassius [24]4 years ago

8 0

Answer:

none of the above

Explanation:

olasank [31]4 years ago

3 0

The correct option as to which is not a possible cause of erosion is none of the above. As a matter of fact, all of these options can cause erosion one way or another. Burrowing animals dig into the ground, and thus can cause chunks of earth to fall apart and cause erosion. Gravity and water can do the same thing, so none of these options are incapable of causing erosion, that is, all of them can do it.

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How is the number of nuclei in telophase different from the number of nuclei present in the cell at the beginning of mitosis

Rasek [7]

Answer: so in the beginning of mitosis there is only one nuclei but during telophase there are 2 nuclei

Explanation: I had the same exact question too but I did some research and I found the answer so here you go :) if I am missing anything please ask <3

5 0

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

erastova [34]

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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6 0

3 years ago

HOW LACK OF CLEAN WATER AFFECTS PEOPLE’S LIVES?

Soloha48 [4]

Answer:

They cant shower nor drink the water cause its not clean

Explanation:

6 0

3 years ago

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Which of the following is a surface event that takes place during the rock cycle?

taurus [48]

The erosion I believe

7 0

3 years ago

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What are some reasons implicit stereotypes might differ from explicit stereotypes?

Gekata [30.6K]

Answer:

Implicit stereotypes are automatically activated and operate indirectly, and thus individuals may not be aware that they possess such beliefs. In contrast, explicit stereotypes are accessible to conscious awareness and are what individuals report when asked about group differences.

Explanation:

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5 0

3 years ago