Bioscience II Exam 2

1. Which of the following is NOT true of cyanobacteria?

They are representatives of the Archaea

There is genetic evidence supporting the theory that today's cyanobacteria are similar to the ancestors of choloroplasts

They are photosynthetic

Their metabolism results in the production of molecular oxygen from water

They are photoautotrophs

About This Quiz

Bio 2 exam. . .

2. What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. Which of the following is true:

3. Which of the following is NOT true?

Fossils that date to 2.5 billion years old include prokaryotes, and eukaryotes including multicellular orgasnism

Limestone deposits called stromatolites, accumulated by cyanobacteria, are known as fossils and are still being formed today

Cells with a nucleus predate cells with mitochondria

The first photosynthetic organisms on earth must have been prokaryotes

The Burgess Shale is known for its fossil demonstration of the Cambrian Explosion

4. The major groupings of life, including the taxa within the prokaryotes and eukaryotes, seem to share a single common ancestor from which these various taxa diverged. From the time of their divergence from this "last universal common ancestor", each major taxon has followed its own, independent evolutionary history-distinctive histories that have resulted in the major taxa which we how see on earth as well as those taxa that are now extinct.

Evidence in support of this includes the appearance of photosynthetic organisms in only one prokaryotic lineage and in plants.

Evidence in support of this includes newly discovered fossils

Evidence in support of this includes evidence of gene transfer from mitochondria to plastids

Evidence in support of this includes secondary endosymbiosis where diplomonads have incorportated actinopods

5. Here is a picture of a marsupial mole from Australia (top) and the etherian North American mole. The striking resemblance between the two (an elongated body, enlarged front paws, small eyes and a pad of thickened skin that protects a tapered nose)

Suggests that they are closely related phylogenetically

Can be explained because continental drifting has subdivided one species into two

Suggests that they are genetically very similar

Two of the above are correct

None of the above is reasonable

6. An 85% or better is required for an A in this course. Imagine a student who has received a 74% on EXAM I, a 90% on Exam II, an 83% on Exam III, and a 90% on iClicker questions. Which of the following is the lowest grade that a student needs to receive on the final to get an A in the course?

78%

80%

81%

82%

83%

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