jellyfish.....
Jellyfish
Organisms
It would be impossible for oxygen requiring organisms to exist before photosynthetic organisms because there was not oxygen in the atmosphere for these organisms to breathe. Photosynthetic organisms take carbon dioxide and water in and create oxygen as waste. Before these photosynthetic organisms existed there was not enough or any oxygen in the atmosphere for organisms requiring oxygen to survive.
Yes I did a science fair project on them
because they need to feed on other organisms
You cannot because you are looking for something that doesn't exist.
She never existed; Medusa is a myth.
Short answer: No.
No, Medusa does not really exist. She is a fictional character from mythology.
Yes, she did. She was one of the three gorgons.
That is what the myth says, but it is only a myth since Medusa does not exist.
Yes, single-celled organisms can exist independently.
According to most modern beliefs, no, Pegasus does not exist. In Greek mythology, Pegasus was a winged horse that came out of Medusa when she was beheaded by Perseus.
Most freshwater hydrozoa exist only as the polyp form. They never switch to the medusa form, or sexual form. This means they exist only in the asexual form.
tissues
Biosphere
Organisms
It would be impossible for oxygen requiring organisms to exist before photosynthetic organisms because there was not oxygen in the atmosphere for these organisms to breathe. Photosynthetic organisms take carbon dioxide and water in and create oxygen as waste. Before these photosynthetic organisms existed there was not enough or any oxygen in the atmosphere for organisms requiring oxygen to survive.