What are some effects of global climate change besides rising sea levels?
What will be an ideal response?
Temperature changes are important cues for many temperate zone species. Abnormally warm spring temperatures are causing deciduous trees to put leaves out earlier, and spring-blooming plants to flower earlier. Animal migration times and breeding seasons are also shifting.
Species arrays in biological communities are changing as warmer temperatures allow some species to expand their range to higher latitudes or elevations. Warmer temperatures are also expected to drive some species to extinction.
Temperature also affects evaporation, winds, and currents, so many weather patterns are expected to change. For example, extremes in rainfall patterns and increased intensity of hurricanes.
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Examine the phylogenetic tree depicted in Figure 26.17 as you address the following questions. The Crenarcheota, Korarchaeota, and Thaumarchaeota are three divisions within the Archaea that share a common ancestor
A. true B. false
Which of the following is an advantage of cDNA libraries?
A. cDNA libraries are easy to make. B. cDNA libraries utilize genomic DNA, which is easy to obtain. C. cDNA lacks introns and therefore reflects all the genes expressed by a particular tissue or organism. D. cDNA lacks exons. E. cDNA libraries are more stable than other DNA libraries.
Positron emission tomography (PET) utilizes ____ to yield results of a scan
a. x-rays b. tracers c. glucose d. ion e. photons
The best descriptive term for resident microbiota is
A. commensals B. pathogens C. parasites d. mutualistic