6. Movement of individuals into or out of the population, called gene flow, impa

Question

6. Movement of individuals into or out of the population, called gene flow, impacts evolution of populations because a. it can lead to extinction of one or more populations. b. it may cause genetic drift. c. it leads to a redistribution of alleles d. adaptive radiation results. e. a founder effect will occur. 7. The first step in the development of living organisms was the formation of a. b. C. d. e. DNA. organic molecules from gases in the atmosphere enzymes. inorganic molecules from elements in the ocean waters. simple sugars. 8. The exact path that led to the evolution of modern cells and the organic molecules contained in these cells to support life is not known. The best guess is that some sort of self-replicating organic molecule formed along mudflats and most likely resembled a. single-stranded DNA. b. single-stranded RNA. c. small amino acids such as lysine and glycine. d. double-stranded DNA. e. ATP The ability to extract oxygen from the environment and use it to make energy is called a. photosynthesis. b. comparative biochemistry c. anaerobic metabolism. d. self-replication. e. aerobic metabolism. 9. 10. Approximately how long ago did the first distinctly human ancestor appear? a. 10,000 years ago b. 100,000 years ago c. 5 million years ago d. 10 million years ago e. 3 billion years ago 11. When naming a life form, which of the following two taxonomic categories is used? a. class and order b. family and genus c. genus and species d. kingdom and phylum e. domain and phylum

Explanation / Answer

Answers

6. it may cause genetic drift

7. Organic molecules from the gases in the atmosphere

8. Single stranded RNA

9. Photosynthesis

10. 10 million years

11. Genus and species

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