When light waves enter the eye, they first pass through the ________

The word "heliocentric" is associated with what conception of the universe?

(a) an earth centered one (b) one held by the ancient Greeks (c) the Copernican model (d) the idea that the world is flat and that the sun rotates around it

In research, investigators often look for performance to level off, that is to reach a

steady state where there is neither increase nor decrease. This steady state is referred to as (a) a paradigmatic state (b) a dominant response (c) a hierarchic constancy condition (d) an asymptote