Can Apple Motion export with alpha to bring into iMovie?

I currently use After Effects / Premier Pro at work. For my home use I need a new laptop and am considering a Mac. The deciding factor will be cost and if iMovie/Motion can do what I want. (I'll probably eventually get Final Cut but its going to be a while due to budget) If I use Motion to create lower thirds, title sequences, and playing a bit with other special effects like particle systems and such... afterwards can I export them with a transparent / alpha background to import into iMovie? I read https://apple.stackexchange.com/questions/17682/how-useful-is-motion-5-without-final-cut-pro-x but it doesn't really cover this. Says I would have to slice up the movie and do the Motion work on top of the exact segment I want it. Until I can afford to upgrade to FCP would Motion and iMovie give me the tools I'm looking for?