The axons of which type of cell form the optic nerve?

What is the term that Thomas and Chess used for babies who are inactive, showing relatively calm reactions to their environment, with moods that are generally negative? They withdraw from new situations, adapting slowly

a) difficult babies b) distractible babies c) slow-to-warm babies d) limited-response babies

Scholars often use _____ to refer to male-female differences that are learned and _____ to designate biological differences

a. gender; sex c. gender; gender b. sex; gender d. sex; sex