During a routine ultrasound, Jaya notices that her fetus is clearly sucking its thumb, in much the same way it will as a newborn. Jaya's ultrasound technician informs her that by the week, fetuses tend to spend increasingly more time in this position.

During a routine ultrasound, Jaya notices that her fetus is clearly sucking its thumb, in much the same way it will as a newborn. Jaya's ultrasound technician informs her that by the 18th week, fetuses tend to spend increasingly more time in this position.

Explanation:

18th month fetus has following characteristics :

Hence, Jaya's ultrasound technician informs her that by the 18th week.

answer; (73%);

answer; ///it examines the interaction between genetics and culture in shaping human biology;