Which of these statements best defines the term middle ages?
a. the period before the growth of the catholic church around the world.
b. the period of interaction beween the islamic and mongol empires.
c. the period between the greek and the roman dominance over european culture.
d. the period following the decline of the roman empire in europe.

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

Look at the photo of the leaf. which term best describes this leaf?

A(n) is a molecule influences the way that a molecule reacts.