Question

Describe 2 homologies (structures that were shared from a common ancestor) between the Zeuglodon and the Orca.

Answer 1

The Zeuglodon and Orca share homologies in their streamlined bodies adapted for aquatic environments and in the skeletal structure of their flippers, both resulting from a shared ancestral origin. These homologies exemplify common evolutionary traits due to shared genetics and embryonic development.

Step-by-step explanation:

Two homologies between the Zeuglodon, an ancient whale, and the modern Orca (killer whale) include their overall bodily structure and specific skeletal elements. Both species have streamlined bodies adapted for efficient movement through water, a characteristic inherited from their common ancestor. This convergent evolution results in a similar body shape that is homologous due to a shared evolutionary history. Moreover, both creatures have homologous structures in their flippers. The bones within the flippers of both the Zeuglodon and Orca are homologous to the bones found in the forelimbs of other mammals. These structures are examples of homology because they have similar embryonic origins and genetic layouts, which are a result of their shared ancestry, despite the different functions the flippers serve in their aquatic environments.

Answer 2

Homologous structures can be described structures which originate in different organisms from a common ancestor and may or may not have the same functions.

Zeuglodons can be described as ancient whales and Orca is a common whale today known as the killer whale.

Scientific studies show that Zeuglodans and Orca have many structures in common such as:

• Having teeth with two roots
• The presence of nostrils
• Pelvis and internal femur bones