|answer need asap | which of these is a disease that testing can be done for in either the parents or the child?

down syndrome
cystic fibrosis
sickle cell anemia
all of the above

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased