Aresearcher designs an experiment by manipulating room temperature (cold, warm, or hot); noise level (quiet or loud); and room color (pink, blue, or black). identify the possible number of main effects.

What causes temperature extremes in the desert

How do cells grow and reproduce to maintain homeostasis?

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.