Twelve-year-old Heather has a smaller head circumference and less ...

[chandani]

Twelve-year-old Heather has a smaller head circumference and less gray matter thickness than typical children of her same age, sex, and size. It is most likely that
 
  a. Heather's mother used alcohol and other drugs during her pregnancy.
 b. Heather's mother has PKU.
 c. Heather has PKU.
 d. Heather has fragile X syndrome.

Question 2

As you bend your arm up to take a drink, the ________ muscles are active, and when you extend your arm to put the glass down, the ________ muscles are active.
 
  a. striated; smooth
 b. flexor; extensor
 c. extensor; flexor
 d. Type II; Type I

[Brenm]

Answer to Question 1

a

Answer to Question 2

b

[chandani]

Thank you!

[Brenm]

Happy to help