Re: Fossils B/C
Posted: December 18th, 2020, 7:42 am
1.stlcards422 wrote: ↑December 17th, 2020, 11:35 am1.EwwPhysics wrote: ↑November 24th, 2020, 9:03 amOk! (sorry about taking so long to respond oops)
1. Compare life before and after the Cambrian Explosion
2. The Marine Mesozoic Revolution was the adaption to what type of predation? Name one example of a predator who exhibited this behavior.
3. What are microbial mats and why are they significant to the Cambrian Substrate Revolution?2.Before, there were non-complex organisms. After, there were more complex organisms3.Shell-Crushing?, Crinoidssheets made up of micro-organisms like bacteria.
Yeah, life became much more diverse and went from mostly unicellular to become more like the animals that exist today.
Yes, shell-crushing. Crinoids were actually easy prey for these shell-crushing predators so most crinoids went extinct due to the MMR. Possible shell-crushing predators included ichthyosaurs, pliosaurs, plesiosaurs, and mosasaurs.
Good job, your turn!
Yeah. They were important for the Cambrian Substrate Revolution because more animals began burrowing into these microbial mats and breaking them down which allowed water/oxygen to get much farther beneath the sea floor, making these layers habitable.