What is the plural of shrub?

What is the shape and polarity of Br2O? Which inner planet rotates in the opposite direction to all of the other planets? Can iron undergo sublimation? What is the size of a cancer cell? How many people died when mount st Helen last erupted? How does urban development interfere with the natural function of floodplains? Explain the second law of thermodynamics and explain why it is not violated by living organisms? When DNA is extracted from E coli cells and analyzed for base composition it is found that 42 percent of the bases are cytosine this means that there is also 42 percent of which base? What are plants in the desert? When did Pluto become a black hole? When a cme occurs on the sun why does it take a couple of days for its effects to be noticed on earth? Will camphor react with iodoform? What does a human geographer does? How did changes in transportation change life in the us? What city is approximately 5 south latitude 15 east longitude? Do jellyfish have a cell wall? Can you have a unipolar magnet? How to repair uneven concrete finish? What step is not essential in producing recombinant DNA? How many bonds are between carbon and oxygen in carbon dioxide?