If a researcher changes a particular aspect of an experiment for an experimental group but not for the control group the researcher has changed the _________

The thick yellowish substance in breast milk that contains important antibodies that are passed on to the newborn is called

A) weaning milk. B) colostrum. C) organogenesis. D) synaptogenesis.

Operant conditioning focuses on how

a. people learn through the association of stimuli. b. people utilize their inborn reflexive habits. c. behavior is influenced by its consequences. d. changes in behavior are related to mental events.