Select all that apply. what is the difference between dna and rna?
a. dna is a protein and rna is a nucleic acid.
b. dna uses deoxyribose and rna uses ribose.
c. dna has adenine and rna has thymine.
d. dna has thymine and rna has uracil.

trachea, alveoli, lung capillaries, arteries

producers within ecosystems are essential as they are at the base of the food chain. plants are examples of producers. they use the process of photosynthesis to capture light energy and use it to convert simple inorganic substances (carbon dioxide and water) into organic substances (glucose).