What information do fossils provide about the history of organisms on earth? a. organisms have stayed exactly the same since the earth was formed. b. fossils do not provide any information about the history of organisms on earth. c. organisms on earth have evolved and changed significantly over time. d. organisms on earth have not evolved or changed during the last 200 years.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.