Select the correct answer. Ronald is a farmer. He has been cultivating corn on the same piece of farmland for many years. After every four planting seasons, he leaves his
land unplanted to help it recover its fertility. Which type of agriculture is Ronald practicing?
OA. shifting cultivation
OB. plantation farming
OC. sedentary tillage
OD organic farming
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shifting cultivation

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.