The ectoderm develops into ____

Which of the following statements about preschoolers' computer use is true?

A) The majority of 2- to 4-year-olds have used a computer at one time or another, with more than two-thirds doing so regularly. B) Because computers can have educational benefits, most early childhood classrooms include computer-learning centers. C) Children under the age of 4 should never be permitted to use a computer, as no educational programs exist for their age group. D) Parental reports suggest that about half of U.S. preschoolers play computer-based games so frequently that it has become a problem.

A group of 2-year-olds watch through a window while a live adult hides an object in an adjoining room. Another group watches the same event on a video screen. Which of the following is likely to occur?

A) Children in the direct viewing condition will retrieve the toy easily, while those in the video condition will have difficulty. B) Children in the video condition will retrieve the toy easily, while those in the direct viewing condition will have difficulty. C) Both groups of children will have difficulty retrieving the toy. D) Children in both groups will be able to retrieve the toy easily.