Metabolism is . the sum of all vital processes by which food energy and nutrients are made to be available and used by the body. b. the sum of all vital processes by which food energy is made available to be used by the body. c. the sum of all vital processes by which nutrients are made available to and used by the body. d. the sum of all calories consumed and used by the body

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.