Prehistoric Life And Timeline

Explanation
According to the "Prehistoric Timeline" video, the first kind of life that appeared was sea creatures. This means that sea creatures existed before mammoths, dinosaurs, and humans.

Explanation
Megalodon is the correct answer because it is widely recognized as the largest carnivorous fish that has ever lived. Megalodon lived approximately 23 to 3.6 million years ago and is estimated to have reached lengths of up to 60 feet. It was a prehistoric shark that had a powerful bite and fed on large marine mammals. Fossil evidence, including teeth and vertebrae, supports the existence of Megalodon as a formidable predator in ancient oceans.

Explanation
The most complete Tyrannosaurus Rex fossil in the world is named Sue. This information is supported by the "Natural History Notebooks" site.

Explanation
The Brontosaurus is the correct answer because it is known for having a small head at the end of a long neck, as well as a long tail. The Brontosaurus, also known as Apatosaurus, was a massive herbivore dinosaur that lived during the Late Jurassic period. Its long neck and tail were adaptations that allowed it to reach vegetation high above the ground and maintain balance.

Explanation
Dinosaurs first appeared 200 million years ago. This is based on scientific evidence and fossil records that show the earliest dinosaur fossils dating back to this time period. The other options are incorrect as they either predate or postdate the appearance of dinosaurs.