Which of the following ecological concepts includes all of the others? community ecosystem population species

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

What are the pros and cons of quadrat sampling?

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)