Earth System History
Earth System History
4th Edition
ISBN: 9781429255264
Author: Steven M. Stanley
Publisher: MAC HIGHER
Question
Book Icon
Chapter 14, Problem 1RQ
To determine

The important ways in which the invertebrate life changed between Ordovician time and Devonian time.

Expert Solution & Answer
Check Mark

Answer to Problem 1RQ

The mass extinction in the ocean during Ordovician Period, lead the development of more advanced reef builders and swimming predators. At the end of Devonian Period, plants spread over the land and vertebrate animals invaded the terrestrial ecosystem.

Explanation of Solution

The marine taxa during Ordovician Period rediversified and became the members of the Silurian and Devonian biota. This diversification was caused due to the mass extinction in the ocean at the end of Ordovician Period about 400 million years ago.

The bivalve mollusks invaded the nonmarine habitats and were found in the Upper Devonian strata of New York State. Some of the important ways in which the life of invertebrates changed include luxuriant reefs and new swimming invertebrates were found.

The reefs produced by the Corals and stromatoporoids were much larger than any of the Cambrian or Ordovician age. Coral-strome reefs attained enormous proportions during Devonian Period. The fossil preserved in reef rocks shows that many invertebrates in habited coral-strome reefs.

A group of straight-shelled nautiloids evolved into new invertebrate swimmers during Early Devonian time. This new kind of swimming animals was called ammonoids. They were coiled cephalopod mollusks and many of them were predators.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
How have recent developments such as globalization, climate change and the new physics, changed the study of religion?
Test 1.2-Language Arts Name 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Record All the questions are matching. Use the answers provided in each category to use in the blanks by each question. There is only one correct answer for each question. Please write only the letter by each answer to fill in the blank. Fill in each blank with a letter. You will have 30 minutes to complete this test for Language Arts. CHRISTIAN HIGH SCHOOL EQUIVALENCY EXAM Parts of Speech and Punctuation Sentences A. apostrophe B. synonym C. noun or pronoun D. quotation marks E. adjective I. root word J. proper nouns K. verb L. action and linking M. gerund F. verb or verb phrase N. adverb O. gender G. abbreviations H. antonyms P. subject Q. nominative, object and possessive R. predicate nominative S. present, past and future T. direct object U. preposition V. appositive W. object of a preposition diunt boving A nosib giodt not bovisado anobi 10 alssido som 10 ow Sometimes…
What do you think were the 3-5 most important factors that elevated the Roman Empire into a Golden Age? List & explain.
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS