What is the main evidence for why the physical and ecological environment of the early Earth is thought to have been very hostile? Comparative embryological studies that show homologies in structure
Experimental results of similar conditions of early Earth
Fossil records of prokaryotic organisms showing similarities in formation
Genetic sequencing data for eukaryotes to show conserved processes

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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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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.