Answer: Pioneer Species
Explanation: Because they are part of a hardy species that whom are the first to move to a previously bio diverse steady ecosystem.
Starfish, or more accurately sea stars, fill a niche as predator and prey in marine ecosystems close to shore. With more than 18,000 species in the world, they range from the tropics to the Pacific Northwest and further north. They can grow larger than a foot across and can have as many as 40 arms. While sea stars are known for their ability to regrow lost arms, they have an unusual digestive system, too.
Answer:
They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
Explanation:
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Uranus is the seventh planet from the sun and the first to be discovered by scientists. Uranus is blue-green in color, the result of methane in its mostly hydrogen-helium atmosphere.
