Why does an egg float in water with a lot of salt, but not in plain tap water?

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Isolated volcanic peaks on the ocean floor are

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?