Secondary sexual characteristics develop during which stage of life?

Which of the following is NOT a consideration when mailing a check?

a. Making sure the check amount is not visible through the envelope b. Being sure to staple a check to an invoice or letter so it does not get lost c. Using a special security envelope d. Including a stub from an invoice being paid along with the check

Hippocampal neurons are more likely to survive when:

a. People are physically active b. People are mentally stimulated c. People are under mild stress d. The neurons are treated with stimulatory medication