Below is a list of functions performed by organisms. examine the list, then answer the question that follows.

gas exchange

intake of nutrients

disposal of wastes

stimulus response

reproduction

how do these functions compare between single-celled and multi-celled organisms?

a.

single-celled organisms must perform all of these functions with one cell, while multi-celled organisms can have specialized cells for different functions.

b.

neither single-celled organisms nor multi-celled organisms can perform all of these necessary functions.

c.

single-celled organisms can perform all of these functions, while multi-celled organisms can perform only some of these functions.

d.

single-celled organisms can perform only some of these functions, while multi-celled organisms can perform all of these functions.

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.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

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