* Body shape: Pakicetus had a long, slender body with short legs and a tail. Modern whales have a streamlined body with flippers and a tail fluke.
* Locomotion: Pakicetus could walk on land and swim in water. Modern whales are exclusively aquatic animals.
* Diet: Pakicetus was a carnivore that ate fish and other small animals. Modern whales have a variety of diets, including some that are filter feeders.
* Size: Pakicetus was a relatively small animal, about the size of a wolf. Modern whales are some of the largest animals on Earth, with some species reaching lengths of over 100 feet.
Ways that modern whales are similar to pakicetus:
* Bone structure: Both pakicetus and modern whales have a similar bone structure, including a skull with a single blowhole and a vertebral column with fused vertebrae.
* Ears: Both pakicetus and modern whales have well-developed ears that are adapted for hearing underwater.
* Intelligence: Both pakicetus and modern whales are intelligent animals with complex social structures.