to determine whether a cause-effect relationship exists between two variables, a researcher must use:

Which experiment would most likely contain experimental bias

Which of the following would be a body response when stepping outside without a coat on a snowy day? a. senaceous glands. secrete more senum b. more liquid is transported by the body to the skin fir insulation c. blood vessels in the skin narrow and contract d. blood vessels in the skin expand

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?