Guiding Questions . How did plankton in the ocean become more modern during the

Question

Guiding Questions . How did plankton in the ocean become more modern during the Cretaceous Period? How did predator diversification influence the marine ecosystem during Cretaceous time? Give a couple of examples of predator/prey coevolution among the marine invertebrates. What unlikely group took over the late Cretaceous reef tropical reef niche? How did terrestrial floras change during the Cretaceous Period? What were the first mammals like? What happened to Gondwanaland during the Cretaceous Period? What was the Sevier Orogeny? What kind of deformation accompanied this Cordilleran orogen? . . . The NAM western interior seaway of the Cretaceous connected which two oceans/embayments (now separate)? What are the "white cliffs" of Dover made of?

Explanation / Answer

Plankton in the ocean become more modern iduring the Cretaceous Period because of evolutionary expansion of dinoflagellates, diatoms and calcaresous nannoplankton during the cretacesous that’s why phytoplankton assumed a modern character.

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