Author Question: There are many jokes out there about the advantage that having opposable thumbs gives human beings ... (Read 142 times)

crazycityslicker · **on:** Jun 22, 2018

There are many jokes out there about the advantage that having opposable thumbs gives human beings over most animals. As your authors note, however, it is not until the age of ____ that children actually start to use their thumbs as part of the grasping process

a. 34 months
b. 56 months
c. 78 months
d. 910 months

Question 2

Which of the following motor tasks appears to have at least a partial biological explanation?

a. Running
b. Throwing a ball
c. Playing kickball
d. Dancing