Please help me
When analyzing tree rings, what do scientists assume a thin ring indicates?
A. a year that was warm or dry
A. a year that was warm or wet
A. a year that was cool or dry
A. a year that was wet or cool

Which experiment would most likely contain experimental bias

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous