Which of the following primates has the largest penis?

Which memory system is preserved the longest, even into Alzheimer's disease?

A) semantic memory B) procedural memory C) episodic memory D) periodic memory

Studies of the perceptual capabilities of infants using the visual cliff have determined that children

a. are reluctant to crawl across either the shallow or deep ends of the apparatus. b. are equally likely to crawl across the shallow and deep ends of the apparatus. c. will only venture out on the deep end if they can crawl. d. will avoid the deep end if they have experienced crawling.