They are broadly classified into two types: nonmotile (primary) and motile cilia. These structures are integral to the spatiotemporal regulation of cellular processes such as proliferation, migration, ...

If you have a rhotic accent, you pronounce the /r/ sound whenever the letter 'r' appears in a word, like in 'learn', 'better' and 'perfect'. North American accents are usually rhotic, and other ...