A good average value for the amount of energy that reaches the next trophic level is about 

A. 20%.
B. 10%.
C. 5%.
D. 2%.
E. 1%.


B. 10%.

Biology & Microbiology

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What important metabolic intermediate does not cross the inner membrane of the mitochondria?  

A.  ATP B.  Acetyl-CoA C.  Pyruvate D.  Oxygen

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The human X and Y chromosomes are

A) both present in every somatic cell of males and females alike. B) of approximately equal size C) almost entirely homologous, despite their different names. D) called "sex chromosomes" because they determine an individual's sex. E) all of the above

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Dolly the sheep ________

A) was the first mammal cloned from an adult cell B) was the first mother who gave birth to a cloned sheep C) received its mother's nucleus from her bone marrow D) received its nuclear DNA from the foster mother

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Methylotrophic bacteria generate ATP by oxidizing methane to methanol then to formaldehyde, which is excreted.

Answer the following statement true (T) or false (F)

Biology & Microbiology