B) surface area and temperature
Probably deserts or plains... are there answer choices ? if there are can you add them in the comments :)
Answer:
The fossil in a rock that has the same shape as the original organism is called a cast fossil
Explanation:
When guard cells lose potassium ions, water diffuses out of the cells by osmosis. As water leaves the cells, they become flaccid and less bowed, which closes the stomata between them.
The study pushes back the clock on the origin of Earth's water by hundreds of millions of years, to around 4.6 billion years ago, when all the worlds of the inner solar system were still forming. Scientists had suspected that our planet formed dry, with high-energy impacts creating a molten surface on the infant Earth.
Answer: 4.6 billion years.
