As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?

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#Question id: 12160

#XL - R Botany

Which of these was not derived from an ancestral alpha proteobacterium?

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#Question id: 12311

#XL - T Zoology

Animals tend to maximize their energy intake- to- expenditure ratio. What is this behavior called?

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#Question id: 12342

#XL - T Zoology

Which of the following is a biological attribute that would most likely allow a species to become cosmopolitan in distribution?

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#Question id: 12344

#XL - T Zoology

The concept of punctuated equilibrium refers to

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#Question id: 12567

#XL - R Botany

Which of the following is true about the current research about forest fragmentation?

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#Question id: 12571

#XL - R Botany

Although extinction is a natural process, current extinctions are of concern to environmentalists because