Answer:There are four main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are eight main blood groups.
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the answer is atmosphere and the second one is plants lead or carbon benthic zone atmosphere aagricullural runoof sediments
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heres the answers i was giving by another brainly students hope you get them right . :)
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Nitrogen fixation occurs between some termites and fungi. It occurs naturally in the air by means of NO x production by lightning. All biological nitrogen fixation is effected by enzymes called nitrogenases. These enzymes contain iron, often with a second metal, usually molybdenum but sometimes vanadium.
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Muscular system.
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The Human muscle system i.e. the muscles of the human body work is a system consisting of skeletal, smooth and cardiac muscles that are under voluntary control. The muscular system is composed of specialized cells called muscle fibers which its function is contractibility. It permits movement of the body, maintains posture and circulates blood throughout the body.
Umm well from my studies shown that its extintion