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| Phase 1 of the creation of life on earth was _____________________. Phase 2 was the formation of self-replicating, information-containing molecules. Phase 3 was the development of a membrane, which enabled metabolism and created the first cells. |
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Definition
| the formation of small molecules containing carbon and hydrogen |
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| One plant species that has evolved in the manner depicted in the figure is: |
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| Which of the following taxonomic ranks is least inclusive? |
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| The taxonomic rank that includes genera but not orders is: |
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| In captivity, tigers and lions have been known to interbreed and produce hybrids, known as ligers. Why does this NOT make them the same species, according to the biological species concept? |
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Definition
| Captivity is not a natural condition. |
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| If formerly interbreeding organisms are prevented from the production of fertile offspring, ____________ has occurred. |
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| Archaea and bacteria diverged: |
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Definition
| about 3 billion years ago. |
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| Plant species A has a diploid chromosome number of 18. Plant species B has a diploid chromosome number of 10. A new species C arises as an allopolyploid of species A and B. What is the most likely diploid chromosome number of species C? |
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| The adaptive radiation of the insects was most probably triggered by: |
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Definition
| evolutionary innovations. |
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Term
| Which of the following molecules was NOT present in the pre-biotic environment? |
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Definition
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| Which of the following is a pair closely-related homologous features? |
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| the study of the diversity of life to understand its evolutionary history |
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Definition
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| The method of speciation that has led to the production of wheat, bananas, potatoes, and coffee is called: |
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Definition
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| According to the biological species concept, species are natural populations of organisms that have the potential to interbreed and that are ____________ isolated from other such populations. |
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| All mammals have hair because they inherited that trait from a common ancestor. Features that are inherited from a common ancestor are called: |
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| Which of the following BEST explains the finding that the nuclear DNA of house cats and African wild cats has a very high degree of similarity? |
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Definition
| House cats and African wild cats share a recent common ancestor. |
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Term
| Homo sapiens is the name of a species. Homo is the name of a genus. Hominidae is the name of a family. Primate is the name of an order. Mammal is the name of a: |
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| The arrow in the figure represents: |
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| Much of what is known about the history of the origin of life came from: |
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