Musical Ds: He wrote the Monkees hits "Im a believer"?

Questions

- An imperfect cadence.?

- The equivalent of two quarter notes or half of a whole note (two beats in 4 / 4 time).?

- A set of notes produced by a vibrating string or air column, determining the difference of tone colours of instruments.?

- The sounding together of notes in a musically significant manner. The main unit of harmony is the chord. The chords are built around the degrees of the scale. The primary chords in most popular compositions are based on the first, fourth and fifth degree of a scale. Many different theories have evolved over the past few centuries about the construction and interpolation of chords to create various senses of musical movement or intellectual or emotional responses. ?

- Upper register of voice.?