Which of the following was true about the experiment conducted by Miller and Urey A. Oxygen was added to a flask
B. Unicellular organisms were added to a flask C. The conditions of early Earth were recreated in a flask
D. Cells were produced in a flask​

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.