How do index fossils scientists?
they aid in the study of ranges of different organisms.
they advance understanding of the origin of life on earth.
they aid in comparison of rock layers at distant locations.
they advance understanding of rock type at the time the organism lived.

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

Which of these is a provisioning service people get from the ocean

The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old