Which takes longer, primary succession ot secondary succession? explain?

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Why does the skin of your finger shrink when you wash clothes for a long time?

What are the seven economic and social goals?