What are the advantages to living in water vs land? What did early land organism have to evolve in order to survive?
Answers
Answer:
Improved Self-Sufficiency – One of the greatest benefits of opting out of regular society is that you'll get a massive lesson in self-reliance. When you live off the land, it means you grow or hunt your own food and harvest energy from the natural resources that are available to you—like the sun or the wind.
The evolutionary history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to the present. Earth formed about 4.5 billion years (Ga) ago and evidence suggests life emerged prior to 3.7 Ga.[1][2][3] (Although there is some evidence of life as early as 4.1 to 4.28 Ga, it remains controversial due to the possible non-biological formation of the purported fossils.[1][4][5][6][7]) The similarities among all known present-day species indicate that they have diverged through the process of evolution from a common ancestor.[8] Approximately 1 trillion species currently live on Earth[9] of which only 1.75–1.8 million have been named[10][11] and 1.6 million documented in a central database.[12] These currently living species represent less than one percent of all species that have ever lived on earth.[13][14]
Answer:
Over the next few billion years, single-celled organisms fused and became multicellular; body plans diversified and radiated, exploding into an array of invertebrates. Yet all this abundance and life was restricted to the seas, and a vast and bountiful land sat unused. Around 530 million years ago, there is evidence that centipede-like animals began to explore the world above water. Somewhere around 430 million years ago, plants and colonized the bare earth, creating a land rich in food and resources, while fish evolved from ancestral vertebrates in the sea. It was another 30 million years before those prehistoric fish crawled out of the water and began the evolutionary lineage we sit atop today. To understand life as we know it, we have to look back at where we came from, and understand how our ancestors braved a brand new world above the waves.