The net reproductive rate (R0 ) refers to the average number of females that will be produced during a lifetime by a newborn female
Indicate whether the statement is true or false
TRUE
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Arctic and alpine tundras have all of the following in
common EXCEPT a. low moisture. b. permafrost. c. minimal plant life. d. cold temperatures. e. nutrient-poor soils.
Most homeostatic mechanisms depend on ________
A) positive and negative feedback B) negative feedback C) predictable environmental conditions D) predictable internal conditions
Cells with a relatively complex morphology that have a true membrane-delimited nucleus are called
A. nokaryotes. B. urkaryotes. C. prokaryotes. D. eukaryotes.
Viruses are not yet considered an organism because they don't have cell membranes, organelles, and do not carry out vital life functions, although they do have a form of DNA (or similar RNA). A researcher proposing to categorize viruses in the tree of life would need to
A. establish any virus as a control group for experimentation with established domains of organisms. B. apply his/her proposal to any newly discovered virus, since others aren't currently considered organisms. C. remember that the scientific method will prevent any changes to the current taxonomy and tree of life. D. propose that relationship to other organisms as a new hypothesis, and test viruses for shared life characteristics. E. show the importance of genetic information as a characteristic of life.