What environmental conditions induce hemoglobin to release oxygen?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Adrought killed all the plants in an agricultural farmland. gradually, due to wind and some birds for. nearby areas, new plants started sprouting l. what stage of succession was taking place in the farmland? a) competition b) nudation c) ecesis d) reaction e) migration