Answer:
An ultrasound scan uses high-frequency sound waves to make an image of a person's internal body structures. Doctors commonly use ultrasound to study a developing fetus (unborn baby), a person's abdominal and pelvic organs, muscles and tendons, or their heart and blood vessels. The ultrasound sound waves have a hard time traveling through air, so the gel prevents any extra air space between the probe and your skin in order to create a clear image of the fetus.
Explanation:
Answer: C. A researcher may claim that one variable causes another to occur if test results are significant.
Explanation:
Correlation analysis is not meant to show causation between variables but merely to find out if there is a relationship.
While there is a chance of one variable causing another if they are correlated, it is not always the case as there might be another unforeseen variable.
Even if results are significant, a researcher should never claim that one variable can cause another from correlation analysis.
Answer:
The serum used for emergency treatment of snakebites stimulates artificial passive immunity.
The skin over your belly is cleaned. An incision is made in your belly. The tissue, blood vessels, and organs in your belly are carefully looked at and checked for problems. Tissue samples (biopsy) may be removed and sent to a lab for study.
