Which part of the eye is not actually a structure , but is simply an opening created by the iris muscle?

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?