Which term describes the absence of steady tempo?

In the Byzantine apse mosaic Transfiguration of Christ from the monastery of St. Catherine, Christ is shown surrounded by:

a. an almond-shaped halo. b. a mandorla. c. blue light. d. all of these. e. none of these.

The group of instruments that invariably plays the ritornello in a concerto grosso

is the concertino.

a. true b. false