Which stage is characterized by a sharply dropping birth rate

How can you keep track of variables in a science experiment?

Which of the following organisms are capable of self-fertilization? a.plants b.tigers c.humans

9. technology can bring both good and bad things. building a vertical farm can increase food supplies in cities (good), but it may cause unemployment in rural areas (bad). give another example of both the good and bad sides of a technological advancement (5 noints)