What are the possible risks involved with lead exposure during childhood?
What will be an ideal response?
A good answer would include the following key points:
• Even tiny amounts of lead can permanently harm children.
• Exposure to lead has been linked to lower intelligence, problems in verbal and auditory processing, and both hyperactivity and distractibility.
• High levels have also been linked to increased levels of antisocial behavior.
• At higher levels of exposure, lead poisoning can result in illness and even death.
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According to the text, when it comes to helping others, females tend to be more helpful than males
a. in emergency situations b. in situations that require repeated contact over long periods of time c. when the victim is a stranger d. when the victim is a child
The typical outcome of a female reproductive cell that has undergone meiosis is
a. one egg and three nonfunctional cells. b. two eggs and two nonfunctional cells. c. three eggs and one nonfunctional cell. d. four eggs.
Which of the following techniques could be described as "massing?"
A) Studying for a test by breaking up your lecture notes into sections and mastering each section before moving on to the next. B) Studying for a chapter test by reading through the entire chapter before going back to the beginning and starting over again. C) Studying each flash card in a large pile before starting over again. D) A football player learning the playbook by reviewing each play once before starting over again.
Beyond about 40°C or 41°C, ____ begin to break their bonds and lose their useful properties.
A. RNA B. DNA C. cells D. proteins