Algae are important for which of the following reasons

a. they are food sources for many aquatic organisms

b. parts of algae are used in foods that humans eat

c. algae produce oxygen as a result of the process of photosynthesis

d. all of the above

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.