What was the first form of life on land?

 

                 Plants were the first to colonize the land, starting with very simple plants such as algae. Then mosses and liverworts developed, followed by ferns and other larger plants. Animals did not leave the sea until plants had become established —otherwise there would have been no food for them. Relatives of the spiders and scorpions were probably among the first animals to leave the sea and colonize the land. At first these animals would have been quite small, and probably returned to the sea to breed, like modern land crabs. Later they evolved into larger and more complex forms of life like modern insects.

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