The scientists are digging for fossils (化石). Fossilized bones tell the story of dinosaurs, animals that were once living creatures and appeared on Earth some 225 million years ago. Dinosaurs dominated (主导) planet for 150 million years, much longer than people have existed....
Instant Expert: Fossils are not just bones and stonesAortic stenosisTranscatheter aortic valve implantationStrokeAtrial fibrillationFossilisation can include the preservation of organic material, such as body tissues, organs and skin. We look at sites that teem with such material...
Predatory animals and early humans alike sought shelter in caves and brought food with them to the eater, leaving bones that paleontologists have discovered.The passage primarily concerns which of the following () A. Types of fossils found in different climates. B. Some physical character of ...
Predatory animals and early humans alike sought shelter in caves and brought food to them to be eaten, leaving bones that have been discovered.Which of the following is true of the environments in which fossils are found() A.Very different environments can favor fossilization. B.There are few...
Body fossils, or mineralized organisms — dinosaur bones and petrified wood and everything else like them— are the best-known kind of fossil. These can include even microbes and grains of pollen (microfossils, as opposed to macrofossils) where the conditions have been right. They make up most...
The seashells and fish bones were covered with soft mud and sand. The mud became hard. It turned to stone. The shapes of the shells and bones were pressed into the stones. These stones are called fossils. Fossils have been found all over our country. Have you ever found one? 1.Some ...
Answer to: The most likely place to find fossils are in a) volcanic rock. b) beach sand. c) the sap of ancient trees. d) sedimentary rock. By...
All the mammoths had tusks (长牙). Scientists found most of the extinct (灭绝的) animals by __(7)___ the fossils, __(8)___ their bones and teeth that could be found.However, mammoths are quite different. During the Ice Age, mammoths died and were covered __(9)___ in the ice...
living fossils(化石).T hey are among the oldest living creatures on Earth.Many sharks look the same as sharks that lived 100 million years ago.Sharks are different from other fish in several ways.T hey have skins that might look smooth , but actually are rough.T hey have no bones(骨头)...
The seashells and fish bones were covered with soft mud and sand. The mud became hard. It turned to stone. The shapes of the shells and bones were pressed into the stones. These stones are called fossils. Fossils have been found all over our country. Have you ever found one? 1.Some ...