Скачать или смотреть What Is Tetrapod Limb Evolution? - Biology For Everyone

What Is Tetrapod Limb Evolution? The evolution of tetrapod limbs is a captivating subject that reveals the journey of vertebrates transitioning from aquatic to terrestrial life. In this informative video, we will explore the fascinating history of how four-limbed animals emerged from their fish ancestors. We’ll examine the key stages of this evolution, beginning with the development of limb-like structures in lobe-finned fish during the Devonian period. By highlighting significant species such as Tiktaalik, Acanthostega, and Ichthyostega, we will illustrate the gradual adaptations that allowed these creatures to thrive on land.

Additionally, we will discuss the genetic mechanisms that played a role in this transformation, including the Hox genes and the Sonic hedgehog signaling pathway. These genetic changes were essential for the development of limbs and digits, enabling tetrapods to support their weight and sense their environment in new ways. As we look at fossil evidence, we will uncover how these early tetrapods adapted anatomically to their new habitats. Join us for this engaging discussion about the remarkable journey of tetrapod limb evolution, and subscribe to our channel for more informative content on biology and the wonders of life on Earth.

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