The major cold ocean current flows equatorward, along the coast of California.
Which explain why San Fransisco has a relatively cool summer compared to the other states in USA
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Answer:
Fossils of the same species of land mammals have been found on separate land masses. Coal fields in the Americas and Europe share many similarities and it is highly possible that they were once connected to form a large coal field.
Explanation:
Fish, Arthropods, Amphibians, and Reptiles all evolved during the Paleozoic Era.
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<u>Answer:</u> The correct answer is Option b.
<u>Explanation:</u>
Nuclear fusion reaction is defined as the reaction in which lighter nuclei combine together to form a single heavier nuclei.
Another name for helium nuclei is alpha particle.
For the given options:
- <u>Option a:</u> The CNO cycle
This cycle is named as carbon-nitrogen-oxygen cycle. In this cycle, carbon absorbs a proton to form nitrogen which further absorbs a photon to form oxygen. Thus, helium particles are not getting fused in this process.
- <u>Option b:</u> The triple alpha process
This process is a set of nuclear reaction in which 3 alpha or helium nuclei combine together to form carbon nucleus.
The equation representing the fusion process follows:

- <u>Option c:</u> Photo dissociation
This is defined as the process in which a chemical compound is broken down by photons. Thus, helium particles are not getting fused in this process.
- <u>Option d:</u> The proton-proton chain
This process is a set of nuclear fusion reactions by which stars convert hydrogen nucleus to helium nucleus. The chemical reactions for this process are:

Here, fusion of protons takes place.
Hence, the correct answer is Option b.
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