The boys end up being adopted by different families. Tom, the brother who lives in a large city, is diagnosed with attention deficit hyperactivity disorder (ADHD). Tests were done and it was discovered that the level of ______________ in his blood was twice the levels found in the general population. The doctors are convinced this is the cause of his disorder.
a. amino acids
b. glucose
c. mercury
d. neurotransmitters
Question 2
Since 1990, there have been no cases in which parents have been ordered to serve time in jail because their children have been truant from school.
Indicate whether the statement is true or false
A rich diversity of life lives in and among coral reefs.
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
This couple, a brother and sister in Germany and the proud parents of this child, are challenging ...
Flow Patterns and Large-Scale Weather: The Steering of Midlatitude Cyclones
The population of a city has continued to grow since 1950.