The age of a rock based on what layer it is in
Ferns are pointy and mosses is not!
Parasites need a host. If a host tries to get rid of the parasite or kill it, then the parasite either has to leave the body or die.
We are the cause of climate change. It is also caused by biotic factors such as variations in solar radiation received by Earth, plate tectonics, and volcanic eruptions.
