From middle adulthood onward, women lose about what percentage of their bone mass?

Sex chromosomes

a. do not come in pairs. b. come in pairs of chromosomes that are about the same size. c. determine the sex of the child. d. are the first 22 pairs of chromosomes.

Your new friend just told you her cell number so you can enter it in your phone. However, you left your cell phone in your dorm room

You keep repeating the number over and over in your head so that you will be able to enter the number in your cell phone once you get to it. What memory strategy are you using? a. rehearsal b. organization c. repetition d. elaboration