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3 years ago

An organism with a cell wall would most likely be unable to take in materials through ________.

1 answer:

7 0

An organism with a cell wall would most likely be unable to take in materials through phagocytosis. This is a process where phagocytes and amoeboid protozoans ingest bacteria and other material. The cell has to bind to the things that it wants to ingest on the cell surface and draw it inward while engulfing around it. It canâ€™t happen unless the cell is within physical contact of the particle it wants to ingest.

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Groundwater contaminated by sewage from a ruptured septic tank can sometimes be naturally purified by flowing for a relatively s

Valentin [98]

Answer:

The correct option is A) sandstone aquifer

Explanation:

Groundwater can simply be described as water which is present inside the Earth's surface in structures called aquifers. Aquifers are materials which have an ideal porosity and permeability which allow water to flow through them. Aquifers are materials like sand, silt or rocks.

Sandstone aquifers can trap waste particles like bacteria while allowing the water to easily flow. Hence, they can be used for sewage from a ruptures septic tank.

4 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

#SPJ1

6 0

2 years ago

Which process is used to make a FULL COPY of the WHOLE DNA strand?

Dmitrij [34]

Answer:

A) Replication

Explanation:

Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell.

Hope this helps :)

7 0

2 years ago

4. A diagram of the human digestive system is shown below. Removing which organ would have the smallest impact on digestion abso

miss Akunina [59]

The esophagus would be removed.

6 0

3 years ago

Read 2 more answers

Which statement best explains what would most likely occur first in the amount of organic matter in an area suddenly

Oksi-84 [34.3K]

Answer:

Explanation:

nitrogen will slowly go down due to not having enough organic matter

6 0

3 years ago