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.

Oxygen, water, and sunlight levels would play a big part in the dominant type of life forms. For plant-like life, some kind of light energy would be needed, probably from a star of some sort (Earth has the sun). There would also need to be enough oxygen to support aerobic respiring organisms. There are several invertebrates on earth (no notochord) that live successfully and are able to adapt; similar or the same types of life forms could definitely dominate this planet, depending on the different conditions provided.

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