What do the cells of a Streptococcus bacterium and a dog have in common? A. chloroplasts

B. nucleus

C. mitochondria

D. ribosomes

Cells destroy body cells infected by a virus or bacteria.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Are the layers of rock above and below the coal older or younger?