Union contracts are:

A) Legally enforceable for both employees and employers.
B) Largely voluntary agreements that neither party is required by law to follow.
C) Not allowed by law.
D) Legally enforceable for the employees only.

The male sex hormones are secreted by which of the following?

A) spermatids
B) interstitial cells
C) vas deferens
D) prostate
E) seminiferous tubules