The transparent portion of the outer eye that allows light to enter the eye is the

Where would one expect to find the most telomerase?

A. male germ cells that give rise to gametes. B. skin cells from a 60-year-old individual. C. skin cells from a 2-year-old individual. D. a nerve cell from a 60-year-old individual. E. a nerve cell from a 2-year-old individual.

In the testcross Aa Bb × aa bb, what proportion of individuals are expected to be homozygous for both genes in the F1 generation?

A) 1/4 B) 1/2 C) 3/4 D) All are homozygotes. E) None are homozygotes.

The thin, circular layers of compact bone are called

a. osteoblasts. b. epiphyseal plates. c. osteoclasts. d. osteons. e. spicules.

As a Drosophila larva molts and becomes a pupa, most of the larval tissues die and adult structures are formed from cells in clusters known as imaginal discs that have remained unchanged throughout the larval stages

Therefore, the disc cells are __________. A) maternal B) zygotic C) embryonal D) differentiated E) transcriptionally activated