Answer: Concentration gradient (happy to help)
Explanation: The particles may move along or against their concentration gradient.
Answer: longitudinal waves
Explanation:
Good luck!!!
Answer:
If I’m correct it’s O cosmic background radiation
Explanation:
Excretory as in excretes things..... anus, bladder, etcetera release waste products.
In cells, the vacuole disposes of waste.
Sweat glands secrete, well, sweat, which can also release toxins from the body.
That's about all I can think of at the moment...
Non-native I believe that is the answer