The Concept of Developmental Constraint May Be Defined as ________

Multiple Choice

The concept of developmental constraint may be defined as ________.

A) the sudden appearance of new phenotypes
B) homoplasy that results from the same underlying developmental mechanism
C) phenotypic similarity due to descent from a common ancestor
D) a bias toward certain kinds of variation in phenotype
E) the fact that all animals develop using the same "toolkit" of Hox genes