Which cells transport oxygen in the blood

The condition in which joints are inflamed is bursitis select the best answer from the choices provided ot f

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

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes