The opening in the front of the eye that is surrounded by the iris and through which light passes is the

What is the equation that would be used to determine the distance between two genes with a cotransduction frequency of 0.68?

A. 0.68=(1 - d/2)3 B. d=.683 - 1 C. d=(1-.68)2

Damage to which of the following brain structures is most likely to be fatal?

A) caudate nuclei B) cerebellum C) brain stem D) cerebrum

The only known source of human embryonic stem cells is:

a. placental tissue. b. umbilical cords. c. early human embryos. d. brain tissue. e. nerve tissue.

____ is an anticoagulant used by leeches

a. Chitin b. Hirudin c. Saxitoxin d. Pheromone e. Calcium carbonate