Answer:
Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.
Nitrogen fixing bacteria.
An energy pyramid is helpful in understanding the relationship between food and energy, because the most energy (generally grass, or plants) is at the bottom, and meat eating predators are at the tippy top (less energy). Producers, primary consumers, secondary consumers and tertiary consumers are all on the energy pyramid. I hope this was helpful:)
