<u>Answer:</u>
<em>Scientists are constantly learning more about fossils to understand the evolution of earth and other living species.</em>
<u>Explanation:</u>
It helps to study the structure of the organisms that are already extinct. Fossils are the conserved remains or traces of animals, plants, and other organisms that exist no more.
Fossils are the significant proof for evolution as it demonstrate that organism on earth was unique from the organism found on earth today. It is also used to study the tectonic history.
Answer:
air is drawn into the lungs
lungs expand
the muscles between the ribs contract to move the ribs up and down
air pressure in the chest cavity decreases
the diaphragm contracts and flattens
Answer:
air and water environments
Explanation:
D. Males that only survive to produce sperm
