In the U.S., the typical duration of a collective bargaining agreement is 1 year.

The birth process is called ________.

A) micturition
B) gastrulation
C) organogenesis
D) parturition
E) expulsion

During its lifetime, a male cichlid fish can switch back and forth between dominant and subordinate social roles. The switch most importantly depends upon ____.

A) distribution of oxytocin receptors
B) water temperature
C) food availability
D) the presence of a larger dominant male
E) the presence of fertile females

Which statement about the hydrologic cycle is accurate?

A) The cycle demonstrates that it is impossible to run out of fresh water for human use.
B) Some water evaporates from land and from plants.
C) All water molecules that evaporate from the ocean precipitate on land and move by gravity through groundwater to the ocean again.
D) Once water sinks into the ground, it is safe from human exploitation or pollution until it has rejoined the ocean.
E) The main source of water in the atmosphere is from evaporation over landmasses.

Plankton consists mainly of microscopic organisms that float in the water.

Identify two plant macronutrients and two micronutrients and provide a physiological role for each.

The framework of organs such as the spleen and liver is made up of ________ tissue.

A) regular dense connective
B) reticular tissue
C) irregular dense connective
D) loose connective

X-ray diffraction images produced by ____ were used by Watson and Crick to infer the structure of DNA.

A) Wilkins
B) Griffith
C) Franklin
D) Hershey
E) Watson and Wilkins