In nature, the predominant form of DNA is supercoiled in a negative direction

Indicate whether the statement is true or false.


Answer: TRUE

Biology & Microbiology

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The difference between microevolution and macroevolution is that

A) microevolution affects bacteria and macroevolution affects larger organisms. B) microevolution happens slowly and macroevolution happens quickly. C) macroevolution happens slowly and microevolution happens quickly. D) microevolutionary changes are small, and macroevolutionary changes are large.

Biology & Microbiology

In humans, which embryonic tissues are "indifferent"?  

A.  vertebral columns B.  brain stems C.  adrenal glands D.  spinal cords E.  gonads

Biology & Microbiology

Heartworms (Dirofilaria immitis) are a type of roundworm that live in and obtain nutrients from the tissues of dogs. These invertebrates affect the function of the dog's circulatory system in a way that can lead to the dog's death. Which term best describes the relationship between heartworms and dogs?

a) mutualism b) predation c) parasitism d) competition

Biology & Microbiology

Regardless of the electron or hydrogen acceptor used, one of the products of fermentation is always

A. alcohol. B. NAD+. C. pyruvate. D. ADP. E. ATP.

Biology & Microbiology