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enot [183]
3 years ago
6

Who proposed that the structure of DNA is a double helix

Biology
2 answers:
artcher [175]3 years ago
6 0
James D Watson and Francis Crick
Oduvanchick [21]3 years ago
4 0
James D Watson and Francis Crick
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Explanation

Stars have a life cycle that begins with the gravitational collapse of a gaseous nebula. Subsequently, thermonuclear fusion occurs that allows the conversion of hydrogen into helium, this causes the released energy to pass through the star and radiate in a phase called the star of seven stellar masses. After several billion years, the star passes to the "red giant" stage. Here the star contracts and raises its temperature. After this, the stars (which have masses greater than the sun) detach from their layers forming supernovae, and later, these give rise to "black holes". According to the above, the correct answer is A. Nebula, star of seven stellar masses, a red supergiant, supernova, black hole.

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Explanation:

<h3>hope it helps..✔</h3>
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