Gravitational bound system of stars,stellar remnants,interstellar gas,dust,and dark matter
The prey will be confused by the appearance of a new animal, and it will not be sure if it's a predator or harmless animal. This usually causes the prey animals big problems because that confusion usually leads to their death. Also the defensive system that the prey has developed is made for the predators it knows, but is usually ineffective with the newly introduced predators.
It is only one...................
Answer:
I don't think that's a condition, the vacuole is like a storage area so it would make sense for it to store water.
