The correct answer is an agricultural revolution.
Agricultural revolutions permitted communities to generate food, which would support huge populations. This permitted for the establishment of technology, like writing and reading. This provided civilizations an advantage over gather hunters.
The agricultural revolution of the 18th century created the path for the industrial revolution. Novel farming techniques and bettered livestock breeding resulted in enhanced production of food. This permitted an upsurge in population and increased health.
Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
Explanation:
The main Function of the Bronchus is the passageway to the lungs and gets smaller the closer it gets to the tissue.
The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere, and atmosphere of the Earth. ... The ocean contains the largest active pool of carbon near the surface of the Earth, but the deep ocean part of this pool does not rapidly exchange with the atmosphere