For Sentence Equivalence, remember that there can be more than one correct answer!
Researchers who study circadian rhythms have found that the physiological processes of animals and plants are neither independent of, nor entirely ___________ external stimuli, such as light and temperature, during a given 24-hour period.
- imperiled by
- analogous to
- coincident with
- perturbed by
- appurtenant to
- concomitant with
If you don’t know some of the vocabulary in the answers, this is a great opportunity to learn some new definitions! I would suggest http://thefreedictionary.com, especially the section called “References in periodicals archive” (you’ll have to scroll down a bit once you look up a word) so that you can learn the words in context. Good luck, we’ll be posting the answer(s) tomorrow!
Update: Here’s the answer/explanation post!