An estimate of the universal phylogeny, based on the small subunit rRNA, is reproduced in the accompanying figure. According to this reconstruction, the domain that Eucarya shares the most recent common ancestor with is ________

Fill in the blank(s) with correct word


Archaea

Biology & Microbiology

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The branched intermediates generated by recombination can be resolved in a number of ways. Which of the following is true of branched intermediates and their resolution?

A. Resolution of the branched intermediate can occur by dissociation of the invading strands and reannealing with their original complements. Gaps are filled in by DNA polymerase and the DNA is sealed by ligase. This is known as synthesis-dependent strand annealing (SDSA). B. Resolution of the branched intermediate can proceed by double-strand break repair. Replication is completed by ligating the strands while they are still linked. Cleaving and rejoining the homologues can result in the original pair of chromosomes. C. Resolution of the branched intermediate can proceed by double-strand break repair. Replication is completed by ligating the strands while they are still linked. Cleaving and rejoining the homologues can result in crossing over between the chromosomes. D. Ligation of the branched intermediate formed by strand invasion results in two four-armed junctions called Holliday intermediates or junctions. E. All of the choices given are correct.

Biology & Microbiology

__________ food webs tend to predominate in most land ecosystems. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

In yeast, which gene would you expect to be activated during phosphate starvation?

What will be an ideal response?

Biology & Microbiology

If the phloem in a tree trunk were to become blocked, how would this affect the plant?

A) The leaves would dry out. B) Sugars could not be made. C) Sugars could not be transported from leaves to roots. D) Water could not be sent to the roots.

Biology & Microbiology