...Beauty, cleaning, DIY tips and more - free to join!
   Login   Contact us   Site map   Puzzle Club   Ask a question    Newsletter

When did animals first appear on the earth?


Question asked by: knowitall

There has been life on earth in microbial form for billions of years.

However, there were no plants or animals as we are familiar with today until relatively recently - the last 550 million years.

Marine invertebrates appeared first, then fish, amphibians, reptiles, birds, mammals and humanity. Land plant communities also evolved from relatively ancient clubmosses, horsetails and ferns, to the more recent gymnosperms (for example, conifers) and angiosperms (flowering plants).

By: Unknown
star star star star
Average rating for this answer is 4 / 5

Rate Answer
Comment or provide your answer to this question
No comments have been added to this question "When did animals first appear on the earth?".
Ask a New Question

Find out more about Biology

Biology Questions and Answers

life Questions and Answers

Next question: when did humans evolve on earth?


Become a Member! It's Free >>>

Share on Facebook: On Twitter: TwitterTweet this!

Question Keywords

earth  appear  animals  

More Questions:

Where Are Your Nerves?
Cortex Vs. Secondary Phloem In Carrot
Tetanus
What Is The Difference Between Of A Light Microscope And A Electron Microscope?
A Husband And Wife Have Three Children, Two Girls And A Boy. The Couple Is Expecting A Fourth Child. What Is The Likelihood That The Child Will Be A Boy? A. 100% B. 75% C. 50% D. 25%?