Which of the following statements is a correct distinction between autotrophs an

Question

Which of the following statements is a correct distinction between autotrophs and heterotrophs?

a-Cellular respiration is unique to heterotrophs.

b-Heterotrophs need a carbon source, autotrophs don’t.

c-Heterotrophs get their carbon from organic sources, autotrophs do not.

d-Heterotrophs need to obtain molecules from their environment, autotrophs don’t.

2. What molecule do animals use as an electron acceptor in cellular respiration?

3.

True or False?:  Plants emit CO2 during the day and during the night.

Briefly defend your answer in 1-2 sentences.

4.Briefly critique the following statement from a scientific standpoint (2-3 sentences)."The carbon in a carbohydrate is changed into energy during respiration. "

a-Cellular respiration is unique to heterotrophs.

b-Heterotrophs need a carbon source, autotrophs don’t.

c-Heterotrophs get their carbon from organic sources, autotrophs do not.

d-Heterotrophs need to obtain molecules from their environment, autotrophs don’t.

Explanation / Answer

1. Answer C, Since autotrophs get their carbon from inorganic carbon sources such as carbon dioxide, where as heterotrops get it from organic sources.

2. Oxygen is the electron acceptor in cellular respiration.

3. True - Since some amount of CO2 is also released during day time. The concentration of CO2 released in day time is less since it utilizes light energy to fix the carbon in its cellular respiration.

4. In the process of cellular respiration the glucose moiety is broken down and is converted as energy sources such as ATP and NADPH upon glycolysis and electron transport chain in the system.

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