There were many plants 400 million years ago. Many of them were very large compared to modern plants. There were trees, cactus, and ferns, to name a few.
There are 400 million seconds in 400 million, as the question is essentially asking for a conversion of a quantity without any specific time unit. If you're referring to how many seconds are in 400 million seconds, the answer remains 400 million seconds. However, if you meant to convert 400 million seconds into years, it would be approximately 12.7 years.
Only at the very end of that period. Turtles first appeared about 210 million years ago. There were no reptiles 400 million years ago.
according to some writers, they've been here for about 400M years.
approximately 400 million years.
around 400 million years
550 million years old
Coelacanths are well known from the fossil record of 400 million to 75 million years ago.
About 400 million years.
395 -400 million years ago
Over 400 million years old.
Fish have been on Earth about 400 million years. Pangea was formed around 270 million years ago.
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