"How do we know that organisms existed millions of years ago"?

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Apatient is in need of hydration. which type of solution are the patient's cells most likely in?

Pls need ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.