Open system: has the transfer and exchange of matter and energy in the system's surroundings.
Closed system: has a limit to how much matter is exchanged.
All of Earth's systems are considered open systems, but as a whole, they are closed.
When cancer cells break away from a tumor, they can travel to other parts of the body through the bloodstream or the lymph system. ... If the cells travel through the lymph system, they could end up in nearby lymph nodes (small, bean-sized collections of immune cells) or they could spread to other organs.
Eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.
Answer:Humans raise large numbers of cattle for food. How will these herds of cows affect Earth's atmosphere? Increase C02 in the atmosphere 6. Analyze: In many tropical rainforests, people clear land by cutting down trees and burning them
Explanation:
