Brenda and her friend are relaxing in a paddleboat, slowly working the paddles with their legs to move the boat. Which organelles in the muscle cells of Brenda’s legs enable Brenda to have the energy for this activity?

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?