Detecting remote homolog by protein similarity network.

A low frequency underwater acoustic projector for sonar apparatus, comprising: a flextension body member consisting of a flexible ellipsoidal shell having mutually orthogonal central major and minor axes;

Most species are small, 4 to 15 mm in length, although some sandgropers (Cylindrachetidae) can reach the length of 40 mm.

Both you and I are students.