Stem cells are being used to treat many conditions, including spinal cord injuries and macular degeneration. However, using stem cells raises some ethical questions. Why are there ethical concerns with using stem cells? A. Harvesting embryonic stem cells often results in destruction of an embryo.
B. Adult stem cells are often harvested without consent from patients in hospitals.
C. Induced pluripotent stem cells are not as powerful totipotent stem cells.
D. Adult stem cells often cause premature aging when injected into younger patients.

a

Explanation:

harvesting embryonic stem cells often results in destruction of an embryo

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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explanation:

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