Explain how hydrogen fuel cells work, and why they provide a healthy, clean way to produce heat and electricity. (Site 1)

What is the importantence of the carbon and nitretan cycles in the environment

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

Both male and female gametes are created during the process of meiosis. the formation of male gametes is called spermatogenesis. after telophase il of spermatogenesis, there would be are all genetically male gametes created that