A sedimentary rock is found to be 300 million years old. Which type of organism is NOT likely to be found in the rock?

insects

mammals

fish

land plants

Question

A sedimentary rock is found to be 300 million years old. Which type of organism is NOT likely to be found in the rock?
		
insects
		
mammals
		
fish
		
land plants

anonymous · Answer

Check out this site https://en.wikipedia.org/wiki/Timeline_of_the_evolutionary_history_of_life You will notice that Insects, Fish and Plants were all known to exist more than 400 Million years ago. This site also indicates when mammals came into being (roughly 200 Million years ago). I hope this helps!

anonymous · Answer

thank you :)

anonymous · Answer

You are very welcome.  If this helped, I'd appreciate your rating it as the best response!