The four-chambered heart first evolved among the:

The exchange of gases between an organism and its environment is known as:

How do terrestrial animals prevent toxic accumulation of ammonia in their tissues?

Refer to the accompanying figure. The function of the structure labeled as 14 is to: heart lec exam 5.jpg

T/F:  Gases move freely across the walls of the bronchioles into the capillaries that surround them.

The process by which the nuclei of sperm and egg fuse to form the zygote:

T/F: Tracheal tubes and spiracles are characteristically found in insects.

The reference range for a laboratory test is the same for all patients.

Autoclaves use dry heat to sterilize equipment.

Which piece of equipment is used to measure the absorbance of light by a solution?