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) Feeding by bear on salmon results in large allochthonous inputs of nutrients into (b) the forest
Although large, the cougar is more closely related to smaller felines.
Biosynthetic Families of Amino Acids in Bacteria and Plants
Polyps, or abnormal growths, on the lining of the large intestine may indicate early stages of colon
Penicillin saved the lives of many soldiers in World War II
This graph illustrates how unattached older adults are poorer than their peers who live in families