The inner layer of the eye consists of the pigmented and neural portions of the

A) choroid and ciliary body.
B) retina and optic nerve.
C) lens and iris.
D) sclera and cornea.
E) lacrimal gland.

The earliest traces of life are found in which geological eon?

A) Archean
B) Hadean
C) Phanerozoic
D) Proterozoic