The principal place in the human ear where sound waves are amplified by means of the vibrations of tiny bones is the ____.

A) pinna
B) ear canal
C) middle ear
D) organ of Corti
E) inner ear

The oldest fossils may be

A) fossilized bacterial mats called stromatolites.
B) microscopic bits of carbon know as zircons.
C) marine animals from the Burgess Shale.
D) petrified pollen grains from ancient plants.

Will the reaction A + B turn into C spontaneously "move" forward if the free energy of A + B is 25 units and the free energy of C is 30 units?

Suppose that a dinosaur's footprints were preserved, but that its body was not fossilized upon its death. Evidence of the existence of this organism is provided by which type of fossil?

A) false
B) impression
C) indented
D) trace
E) print

The TEAM Act is intended to make it easier for employers to design and implement employee involvement programs.

Which of the following factors assists in the return of venous blood to the heart?
(1) Arterial dilation
(2) Valves in the veins
(3) Sympathetic stimulation
(4) Compression of veins by muscular movements

A) 1 and 2
B) 1, 2, 3
C) 1, 2, 3, 4
D) 2, 3, 4
E) 1, 3, 4

The eyes develop as evaginations from the ________.

A) myelencephalon
B) mesencephalon
C) neural crest cells
D) diencephalon
E) telencephalon

All of the following are components of the lymphatic system, except the ________.

A) thymus
B) pineal gland
C) spleen
D) lymph nodes
E) lymphatic vessels