9) The words "We immediately departed for Paris on a Eurostar train" make up a(n) .

Simple Sentence

Explanation:

The given words belonging to different parts of speech together make up a 'simple sentence.' The subject(pronoun 'we') followed by the verb('departed') and the two prepositional phrases in a row('for Paris' and 'on a Eurostar train', both functioning as an adverb to modify the action). All these elements together follow the structure of a simple sentence conveying a complete sense both lexically and syntactically. Hence, it is a simple sentence.

this is more of an opinionated response

explanation:

answer it yourself

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.