Immediately following a gene duplication event, what is the most likely evolutionary outcome for a duplicated gene?
A) Duplicated genes usually evolve to perform new functions that differ from their original function (called neofunctionalization), or both duplicate copies evolve via subfunctionalization.
B) Most gene duplication events are selectively neutral and therefore the duplicated gene usually spreads through the population. It can later evolve a new function or keep its original function.
C) Most gene duplication events are deleterious to an organism and therefore are lost due to natural selection.
D) Most gene duplication events are selectively neutral and are therefore lost due to drift.
D
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Under the Linnean system of classification which level is an immediate subcategory of Phylum?
a. Species b. Kingdom c. Family d. Order e. Class
Which muscles may contract during inspiration?
a. external intercostals. b. internal intercostals. c. abdominal. d. both b and c.
The carbon needed to build organic compounds in plants comes from ________, while the hydrogen and oxygen comes from ________.
A. carbohydrates; hydrogen and oxygen gasses in the atmosphere B. glucose; hydrochloric acid C. carbon dioxide; water D. oxygen in the atmosphere; hydrogen peroxide
Your senior thesis project involves working out the taxonomy of Florida skinks. To accomplish this you examine skink specimens for morphological differences compare nucleotide and amino acid sequences and observe the skinks reproductive behavior and habitat types. Once you have completed the taxonomy and written the thesis you give it to your professor for comments. She tells you that you did a great job and should try to get your work published. However she suggests you indicate in the introduction what species concepts you used to make your classifications. What statement would you add?
A. Taxonomic determinations were made based on the general lineage species concepts. B. Taxonomic determinations were made based on the ecological species concepts. C. Taxonomic determinations were made based on the evolutionary lineage species concepts. D. Taxonomic determinations were made based on the biological species concepts.