How does the asthenosphere interact with the tectonic plates at a divergent boundary?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o