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tensa zangetsu
2 months ago
12

Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for

breathing. while whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales
Biology
2 answers:
Tresset [2.2K]2 months ago
6 0

Both whales and dolphins retain their pelvic (hip) bones. These bones play a role in supporting and distributing the trunk's weight to the hind limbs.

This suggests that the existence of pelvic bones may point to a terrestrial lineage for whales.

11111nata11111 [2.5K]2 months ago
3 0

Answer:

Hence, the existence of a pelvic bone may suggest that whales descended from land-dwelling ancestors.

Explanation:

According to evolutionary theory, the pelvic bones of whales are remnants from their ancestors who roamed the planet over 40 million years ago. The widely accepted theory maintains that these bones are merely vestigial, diminishing gradually over time. By definition, 'vestigial organs' pertain to body parts that serve no current purpose, being remnants from an evolutionary forbear.

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