Prior to mendel: a. humans observed, manipulated, and understood heredity and how it worked. b. humans observed and manipulated heredity; however, they did not understand how it worked. c. humans knew that heredity was controlled by genes; however, they didn't know the dna structure. d. humans had no ideas about heredity. e. humans observed heredity; however, they could not understand or manipulate it.

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