Answer: A
Explanation: the use of energy is a characteristic that distinguishes a fire from a flowering plant.
Answer:
Explanation:
all living organisms are built of carbon compounds. Nitrogen fixation: special bacteria convert the nitrogen gas into ammonia that plants then use. ... nitrogen is the required nutrient for living things to produce organic molecules. it's the building block of DNA, RNA, proteins, and nucleic acids.
Answer: B. From the sun.
Most producers absorb energy from the sun.
