Several studies of adolescents<span>, including one </span>with more<span> than 3,000 high school students, found that inadequate </span>sleep<span> is associated </span>with<span> higher levels of depressed mood, anxiety, behavior </span>problems,<span>alcohol use, and attempted suicide. </span>
Explanation:
In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.
In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.
In the remaining cases, the error occurs after fertilization, as the embryo grows.
Widened margins does not occur at the continental margin
The answer is A The pancreas regulates blood glucose through hormones.
The answer is D - cellular respiration <span />
