#Question id: 8773
#XL - T Zoology
Which eukaryotic kingdom includes members that are the result of endosymbioses that included an ancient aerobic bacterium and an ancient cyanobacterium?
#Question id: 8775
#XL - S Microbiology
Use the following information to answer the question. Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "chromatophores." The chromatophores are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants. A crucial photosynthetic gene of the cyanobacterium that gave rise to the chromatophore is called psaE. This gene is present in the nuclear genome of the cercozoan, but is not in the genome of the chromatophore. This is evidence of ________.
#Question id: 8776
#XL - S Microbiology
What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom?
#Question id: 8783
#XL - R Botany
Which of the following statements is accurate, at least according to our present knowledge?
#Question id: 8787
#XL - R Botany
Which of the following statements is accurate, at least according to our present knowledge?
#Question id: 8788
#XL - R Botany
A phylogenetic tree is shown for the three
domains of life (Eukarya, Archaea, and Bacteria). The tree branches in two
directions from the first point, labeled Common ancestor of all life. One
branch leads in the direction of Eukarya and Archaea, and the other branch
leads to Bacteria. The branch leading to Eukarya and Archaea divide, one branch
leading to each domain. The branch leading to Eukarya divides into four
branches. One leads to Euglenozoans, and the other three lead to branching
points. The first leads to Forams in one direction, and another branching point
in the other that leads to Diatoms and Ciliates. The second branching point
leads to Red algae in one direction, and a branching point that leads to green
algae and land plants in the other direction. The third branching point leads
to amoebas in one direction, and a branching point that leads to fungi and
animals in the other direction. Land plants, Fungi and Animals are all
highlighted.
Examine the figure. If you were a graduate student trying to develop a thesis project that would resolve polytomies, which of the following groups would you study?