What structure prevented the red onion cell from swelling up and bursting when they were placed in water? A. vacuole
B. cell wall
C. Nucleus
D. cell membrane​

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

Where does the information about where each transcription factor binds originate?