genetic combination, production of more offsrping that can survive, and struggling with the challenges of the environment are all concepts associated with

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

What does this experimental investigation lack

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.