1. Organisms that branch near the base of the phylogenetic tree are least likely

ID: 164250 • Letter: 1

Question

1. Organisms that branch near the base of the phylogenetic tree are least likely to be…

A. aerobic

B. chemolithoautotrophic

C. acidophilic

D. hyperthermophilic

2. Which environment is unlikely to support Archaea?

A. hot spring B. termite gut

C. deep ocean D. archaea are found in all of these habitats

3. Which of the following is not true of anoxygenic photosynthesis?

A. Calvin cycle is required

B. can proceed under anaerobic conditions

C. can proceed using infrared radiation

D. all of the above are true

4. Which phylum represents the oldest phylogenetic branch of the bacteria domain?

A. Cyanobacteria B. Aquificae

C. Thermoplasmas D. Halobacteria

5. Which group of organisms did not exist before the evolution and radiation of oxygenic phototrophs?

A. Green non-sulfur bacteria

B. Aquificae

C. Crenarcheota

D. Chlamydia

1. D) hyperthermophilic organisms

2. D) D. archaea are found in all of these habitats ("archaea" is an example of extremophile.)

3. A) Calvin cycle is required. calvin cycle is required for oxygenic photosynthesis.

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