An antigen
a. is a foreign molecule that evokes a specific response by a lymphocyte
b. is a protein attacked by an invading microorganism
c. induces development of white blood cells in the bone marrow could be an invading bacterium
d. is a protein molecule that defend the body against disease

Plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.plants transfer carbon in the carbon cycle a. through assimilation of carbon from the soil. b. when carbon transpires from their stomatae. c. when they are eaten by animals. d. through fixation of carbon in the soil.