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Dmitrij [34]
3 years ago
8

Ancient prokaryotes may have entered primitive eukaryotic cells, remained there, and evolved into organelles. InferIs it likely

that nonphotosynthetic prokaryotes could have evolved into chloroplasts? Explain your answer.

Biology
1 answer:
Viktor [21]3 years ago
3 0

Answer:

yes that is the serial endosymbiosis theory

they have similar inner membrane structure and function

they make their own DNA

cell division is similar

their ribosomes are more similar to prokaryotes than eukaryotes

Explanation:

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On the pH scale 7 is a neutral. Anything below 7 is acidic and anything above 7 is a base.
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How to figure the scale diameter of a planet
nevsk [136]

Answer:

Planet diameter = 2p × (distance to the planet) × (planet's angular size in degrees)/360°. Planet volume = (p/6) × (planet diameter)3. Density = mass/volume.

Explanation:

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Quiz: Human Impact on Ecosystems 8:Human Impact and Technology
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it's usually because they have no predators or very little

Explanation:

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7 0
3 years ago
g If a person takes a prescribed dose of 10 milligrams of Valium, the amount of Valium in that person's bloodstream at any time
Elenna [48]

Answer:

a. 8.1 milligrams

b. 40.07 hours

c. 8.859 milligrams

Explanation:

If a person takes a prescribed dose of 10 milligrams of Valium, the amount of Valium in that person's bloodstream at any time can be modeled by

A_{t}=10e^{-0.0173t}

Where A(t) = amount of Valium remaining in the blood after t hours

t = time or duration after the drug is taken

a. we have to calculate the amount of drug remaining in the bloodstream after 12 hours

A_{12}=10e^{-0.0173\times12}

A_{12}=10e^{-0.2076}

                = 10×0.81253

                = 8.1 milligrams

b. In this part we have to calculate the time when A(t) = 5 milligrams

5=10e^{-0.0173\timest}

\frac{5}{10}=e^{-0.0173t}

0.5 = e^{-0.0173t}

Now we take natural log on both the sides of the equation.

ln(0.5) = ln(e^{-0.0173t})

-0.69314 = -0.0173t

t = \frac{0.69314}{0.0173}

t = 40.0658

 ≈ 40.07 hours

c. In this part we have to calculate the rate, by which amount of drug will decay in the bloodstream after 7 hours.

A_{7}=10e^{-0.0173\times7}

A_{7}=10e^{-0.1211}

              = 10×0.8859

              = 8.859 milligrams

6 0
3 years ago
The increase of carbon dioxide in the atmosphere has had which effect on the earths climate?
a_sh-v [17]

Answer: A. Average rainfall has decreased

Explanation:

I might be wrong. sorry if i'm wrong

8 0
3 years ago
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