Answered: ស អាព AMMOND Jurassic an Cretaceous

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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According to a study by Daniel et al. (1997), nautiloid and ammonoid shells with simple suture patterns could withstand great pressure but have poor buoyancy control whereas the opposite is true for those with complex suture patterns.Given the trend of increasing suture complexity over time in the shells of ammonoids (see figure on the right), how did their habitat change over time?

Cambrian
1730
to Recent
NAUTILOID
GONIATITIC
Devonlan
to Permlan
AMMONI
Jurassic an
Cretaceous
CERATITIC
Late Permian
to Triassic
AMM

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Ammonoids are extinct marine mollusc animals. These molluscs commonly called as ammonites. Their soft body parts are very rarely preserved. Ammonoids suffered three major diversity crisis. Most of them lives in open water of ancient seas. Ammonoids mainly lives in more shallow seas and may have a maximum depth of about 400 meters. Their nature is poorly understood because lack of close related species and sof body fossils.

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