Will give 20 Points and Brainliest if somebody helps clarify and answer

What role do bacteria play in the carbon cycle

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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