Most mammals experience REM sleep

Children who are multilingual __________.

a. take longer to master the second language when they learn it after already becoming fluent in the first language b. are usually behind their monolingual counterparts in metalinguistic skills c. learn the second language better after age 12 because they have a more sophisticated understanding of syntax d. score lower on tests of metalinguistic skills, but higher on IQ tests

Imbalance, nausea, and vertigo can result from a head cold or ear infection when pairs of semicircular canals are simultaneously stimulated (i.e., depolarized in both left and right ear canals)

a. true b. false