The same rocks and minerals from the same batch, dinosaur fossils dating back to the same time periods, natural landforms and structures can be found on completely separate continents. This evidence supports the Plate Techtonics and Continental Drift theories.
today's species evolved from those of the past.
Fossils found, such as Wolly Mammoths,differ in many ways. Wolly mammoths are the ancestors to the elephants we have living today. The difference? Wolly mammoths are much longer and differ in size. For example, if you had a mammoth and an elephant stand on their hind legs, the mammoth would be taller.
Index
They provide evidence for animals that existed before and do not now. It shows proof of the different evolution. It also gives us comparisons of organisms we have today and where they possibly came from.
They say that there were more animals before that went extinct, but the animals that are here today survived and are still here.
Because other animals that are extinct today may have existed
Fossils are the only way to learn which animals are extinct or have changed over time. We can look at animals that exist today and speculate concerning on the appearance of a common ancestor. We frequently have to change our opinion when we find a fossil.
Tirtiary
yes.Related Information:The resemblances are not always easy to see.Examples that are easy: mammoths/elephants, Mystriosuchus/crocodiles, and certain birds/small dinosaurs.
no
The sloth still exists today. They are not extinct.
Organisms such as dinosaurs, trilobites, ammonites, and dodo birds are examples of extinct organisms found in fossils. These organisms used to inhabit the Earth in the past but are no longer alive today.
Humans are the answer! humans caused more animals to go extinct than any other animal.
Cows
Extinction of animals (or rather species) happens all the time and has been going on for hundreds of millions of years. All the fossils we find in the rocks are species that are now extinct. It is therefore impossible to tell you just how many animals have gone extinct. However, you question may have been prompted by concerns for our planet and its ecosystem today and you may therefore be asking How many animals have gone extinct because of man's activities? This a good question, unfortunately I don't know the answer to this so I will ask it. (The answer is in the related question below)
All animals and organisms have been evolved from one same thing, a cell. As it evolved and reproduced, it created variability even within its own type, creating genetic diversity. This eventually created various forms of them, sometimes so drastic, that made them completely different from the original. As you look through the biology related books, it's likely that you'll be able to see these trees. Kingdoms, phylum, class, etc are all generated due to so many variants of organisms. Back to the extinct animals- These extinct animals resemble some of our live animals today, because most likely, they were evolved within the same tree of class. However, due to certain problems such as environmental changes, lack of survival, etc, some animals do become extinct. While they may become extinct, animals that were generated within the same tree may still live somewhere else around the world, still able to live through. This can be related to survival of the fittest.