Answer:
A heard of cattle
Explanation:
A heard of cattle is most like a community, because they stick together and are in a large group. A population, so happens to be almost exactly like a community except for a few differences
The respiratory system that allows for Gas Exchange happens between Alveolar Spaces and Capillaries
Cell membrane
Cytoplasm
ER
Nucleus
Ribosomes
Golgi body
Lysosomes
Mitochondria
Vacuoles
Because cells are in ever living thing
A heart pound? I'm guessing lmaoooo