what structures did the ancient whale basilosourus have that whales today do not have

iT was their legs right

Right.

Yes, you are correct! Basilosaurus, an ancient whale that lived about 40-34 million years ago, had some unique structures that modern whales do not possess. One of the most significant differences is their hind limbs or legs.

To find this information, you can start by conducting a search using reliable sources such as scientific articles, research papers, or educational websites. Here's an example of how you can search for information about the differences between Basilosaurus and modern whales:

1. Open a search engine like Google.
2. Type in the search query: "differences between Basilosaurus and modern whales."
3. Go through the search results and look for reputable sources such as scientific journals, museums, or educational institutions.
4. Click on the relevant sources to gather information on the topic.

Once you find a trusted source, you can look for specific information about Basilosaurus's unique structures and how they differ from those of modern whales. Look for details about its legs, which were present in Basilosaurus but absent in modern whales.