While hiking in the forest, paul came upon a bear hunting along the river. paul knows the best thing to do is to remain quiet and back away very slowly, but his body is suddenly primed to run away at full speed. the system is activated when paul first encounters the bear?

I’m stuck on this question cuz i’m stupid sksksksk

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

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.