Double fertilization occurs when two sperm cells fertilize the two polar nuclei. the sperm and tube nuclei fertilize the egg. the polar nuclei fuse with the egg after it has fused with the sperm. one sperm fuses with the egg and the other sperm fuses with both polar nuclei.

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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.

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