Cambridge Preparation for the TOEFL® Test Book with CD-ROM

Provides test-taking strategies, skill-building exercises, sample essays and speaking responses, and practice tests.

Only the toothed whales, Odontoceti, have this capability, although baleen
whales do have the apparatus for echolocation in a vestigial form, which
suggests that they may have been capable of using echolocation in the past. I will
go on now to discuss odontocete skull anatomy and how echolocation is
achieved. If scores on IQ tests are anything to go by, it seems that people are
becoming more intelligent. Since the 1950s, test scores have been rising, and
although many studies have ...