Maria and sam are studying about cells, tissues, organs, and organ systems in the human body. this is a picture of the human digestive system. each part is a different color. each part does something different during the process of digestion. even though each part of the digestive system is different, each part is also alike. what is one thing that each part shares with the others? a) each part contains organs. b) each part of the system is made of cells. c) each part breaks down food into smaller pieces. d) each part of the digestive system is made of exactly the same cells.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.

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answer: b. nucleolus

explanation: nucleolus is a structure in the nucleus are ribosomes are made.

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: d

-charlie

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: d