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fenix001 [56]
3 years ago
11

16)

Biology
2 answers:
Oksi-84 [34.3K]3 years ago
7 0

Answer:Fossil fuels may one day run out.

Explanation:

Fossil fuels supply most of the energy for our use on Earth. But gasoline and other fossil fuels are non-renewable natural resources. This means that fossil fuels may one day run out.

ivolga24 [154]3 years ago
5 0

I believe the best answer is A.

People are more afraid in fossil fuels running out rather than the other reasons that don't really affect the people today. Hope it helped!!!

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Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of
ELEN [110]

Answer:

Total 495 liters of natural oil are needed.

Explanation:

It is given that Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{5}{5+3}=\frac{5}{8}

Let in order to make 792 liters of Petrolyn oil he needs x liters of natural oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{x}{792}

Equate both ratios,

\frac{x}{792}=\frac{5}{8}

On cross multiplication we get

8\times x=5\times 792

8x=3960

Divide both sides by 8.

x=\frac{3960}{8}

x=495

Therefore total 495 liters of natural oil are needed.

6 0
3 years ago
Renewable resources can be used without worry about consequences to the environment.
Ugo [173]

The answer is option one "true." Renewable resources are things that can be used repeatedly and can be replaced, which means  it doesn't affect the environment. Renewable resources are like: Oxygen, water, wood, and paper all are are renewable sources. Nonrenewable sources are things that cannot be replace naturally which is because the formation of these sources takes millions even billions of years nonrenewable sources include: oil, coal, and some gases.

Hope this helps!

5 0
3 years ago
Read 2 more answers
Explain the relationship between correlation and causation.
ohaa [14]

Answer:

Correlation indicates that the two numbers are related in some way.

Causation requires more proof that there is no lurking variable that creates the relationship.

Explanation:

6 0
2 years ago
Identify a structure other than a cell wall or a vacuole that might be found in a plant cell but not in an animal cell. explain
enot [183]
One structure that can be found is most plant cells is chloroplast. A plant cell may have around 0 to 20 chloroplast, depending on their location in plant or their function.

Chloroplast is the structure that photosynthesis occurs. Photosynthesis is the method that plant make food for themselves. They turn sunlight into food such as starch.

Plants are autotrophs, which means they make food themselves, they don't need food from other sources like animals. Therefore, chloroplast is not found in animal cells because we are heterotrophs, we feed on other food.
4 0
3 years ago
Steroids send chemical signals to different parts of an organism's body. What class of macromolecule do they belong to?
Masja [62]
The class of macromolecule a steroid belongs to is a lipid.
7 0
2 years ago
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