Average time on market: 41 days Certified Pre-Owned: No Transmission: Automatic Color: Onyx Black Description: Used 2012 GMC Yukon XL 1500 SLT 4WD for sale - $16,900, 118,236 miles with Bluetooth, Leather Seats, Backup Camera, Aluminum Wheels, Navigation System.
How long ago did the first living forms appear on earth? the earliest known life form were single celled organisms which roamed the earth they appeared around two billion years ago Answer: The Earth formed about 4.5 billion years â¦ ago. 700 million years later (3.8 to 3.5 billion years age) life started.5 people found this useful.he earliest known life form were single celled organisms which roamed the earth they appeared around two billion years ago Answer: The Earth formed about 4.5 billion years â¦ ago. 700 million years later (3.8 to 3.5 billion years age) life started. 5 people found this useful.
How Did Life First Appear. The fact that life began on earth is just a natural consequence of the known fundamental laws of chemistry and physics. Life was inevitable, once certain conditions prevailed.ow Did Life First Appear. The fact that life began on earth is just a natural consequence of the known fundamental laws of chemistry and physics. Life was inevitable, once certain conditions prevailed.