Read the sentence. Once the scientist completed to assemble the components, she tested her new device to see if it performed as expected. What is the best word to replace the infinitive in the sentence? assembling assemble assembled assembly

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.