Carbon-14 dating would be useful in finding the age of

A.

a fossilized fish found in a layer of rock estimated to be between 15,000 and 25,000 years old.

B.

a fossilized spore estimated to be over 200,000 years old.

C.

a sedimentary rock with a leaf imprint of undetermined age.

D.

an index fossil known to have lived in the oceans 1 million years ago.

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.