S Sandra P New member Jul 9, 2009 #1 a. used in nonverbal communication b. found only in the invertebrates c. signals to members of other species d. types of internal hormones that control maturation e. are only used for sexual reproduction
a. used in nonverbal communication b. found only in the invertebrates c. signals to members of other species d. types of internal hormones that control maturation e. are only used for sexual reproduction
