An introduced species that's sometimes harmful to the prairie chicken (native species) is

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

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called