What is the common name of the group whose members are characterized by exoskeletons and a unique water vascular system?
a. brachiopods
b. medusas
c. echinoderms
d. tunicates

Which industries produced great profits and wealth in the late 1800s

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

Which of the following is most accurate: early medieval art centered largely around christian subject matter. early medieval art relied heavily on black and white color palettes. early medieval art was limited to painting. early medieval art preceded roman art.