Answer:
The nucleus is an organelle found in eukaryotic cells.
Explanation:
Asteroids vary greatly in size and are mostly made up of frozen water and gas. This one is true.
They are said to be "mostly formed of ice and gas" as they rarely can be found consisting of stone, nickel and iron. These are extremely dangerous in our Universe.
Answer:
Symbiosis is a close relationship between two species in which at least one species benefits.
Explanation:
