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zloy xaker [14]
4 years ago
6

The earth's___ is a source of fossil fuelA. trees B.landC.water

Biology
1 answer:
gulaghasi [49]4 years ago
5 0

Answer:trees

Explanation:

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Contains only one double bond between carbons.
zlopas [31]

Correct option b) A saturated fatty acid

When only one double bond in the molecules that is also known as monounsaturated fat. If there is more than one double bond that is known as polyunsaturated fat.

Unsaturated fatty acids have one or more than one carbon- carbon band  double bonds. That indicates the maximum possible numbers of hydrogen atoms are bonds to each carbon in the molecule. These carbon  form double bonds with the carbons next to them.

Alkenes contain carbon- carbon double bonds and unsaturated hydrocarbons with the molecular formula is Cn H2n. This is made of chains where some carbon atoms are not fully saturated with hydrogen atoms.

To learn more about polyunsaturated fat here

brainly.com/question/13141983

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7 0
1 year ago
Any help? question in the photo.
BartSMP [9]

Answer:

The lymphatic system is a combination of circurlatory and immune systems

Explanation:

yw :))

5 0
2 years ago
Can you identify how chemicals cycle in an ecosystem?
natulia [17]
Nutrients move through the ecosystem<span> in biogeochemical </span>cycles<span>. A biogeochemical </span>cycle<span> is a circuit/pathway by which a </span>chemical<span> element moves through the biotic and the abiotic factors of an</span>ecosystem<span>. It is inclusive of the biotic factors, or living organisms, rocks, air, water, and </span>chemicals<span>.</span>
7 0
4 years ago
Which organelles comprise the endomembrane system of a cell?
mr Goodwill [35]
Nuclear envelope.

Endoplasmic reticulum.

Golgi apparatus.

Vacuoles.

Vesicles.

Lysosomes.

Spitzenkörper.

Plasma membrane.
6 0
3 years ago
Which statement describes a characteristic of a spiral galaxy?
artcher [175]

Answer:

If your just looking for a description here you go.

Explanation:

Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars. The bulge in the center is made up of older, dimmer stars, and is thought to contain a supermassive black hole. Approximately two-thirds of spiral galaxies also contain a bar structure through their center, as does the Milky Way.

Hope this helps.

4 0
3 years ago
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