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20 Cards in this Set
- Front
- Back
Mission Statement
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The mission of Weatherford College is to provide quality learning opportunities and effective programs that serve the need of our students and the citizens of our service area.
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A group that consists of all the evolutionary descendants of a common ancestor is called a(n)
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clade
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A synapomorphy is
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A shared derived characteristic
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Which of the following would not be expected to result in homoplasy?
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The inheritance of ancestral trait.
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A derived trait is one that
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differs from its ancestrial form
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Which of the following statements about reconstructing phylogenies is false?
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Shared traits are generally assumed to be homoplastic until they can be proven to be homologous.
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The most important limitation of fossils as a source of information about evolutionary history is that
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the fossil record for many groups if fragmentary of even nonexistent.
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Which source of molecular data would be most helpful for a study of the evolutionary relationships of closely related animal species?
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Mitochondrial DNA
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Which of the following statements about the use of molecular clocks in phylogenetic analysis is true?
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Molecular clocks must be calibrated using independent data, such as the fossil record.
and Even in a group of closely related species, it has been found that different genes evolve at different rates |
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A soil sample contains large numbers of ROD- SHAPED BACTERIA. The bacteria are referred to as
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bacilli
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The dense FILMS laid down by many prokaryotes are
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biofilms
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Gram-negative bacteria stain pink because
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their peptidoglycan layer is thin.
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A bacterium that requires a carbon source other than carbon dioxide, yet can convert light energy to chemical energy, is called a
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photoheterotroph
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A bacterium that cannot live in the presence of oxygen is called
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OBLIGATE ANAEROBE
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Biofilms
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are examples of complex communities that prokaryotes may form and can protect bacteria from attack by the immune system.
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Peptidoglycan
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is present in the cell walls of almost all bacteria.
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Which means of locomotion is not used by prokaryotes?
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Beating cilia
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Bioluminescence
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can be bright enough to be detected from space.
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Which of the following types of prokaryotes are most sensitive to oxygen?
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Obligate anaerobes
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Which of the following classes of organisms is dependent of organic molecules as both the source of energy and carbon?
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Chemoheterotrophs
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