Most pH buffers are ____
a. strong acids
b. weak acids or weak bases
c. weak acids
d. strong bases
e. strong acids or strong bases
ANSWER: b
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As a population declines in size, what would you predict? Check all that apply.
_____ Loss of genetic variation. _____ More individuals with heterozygote advantage. _____ Deleterious alleles can become fixed due to chance. _____ Homozygosity within individuals in the population will decline. _____ The few remaining individuals will be tough, healthy and fertile. _____ If the environment changes, the population will adapt quickly. Additional: Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about population size and genetic diversity? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Rhodobacter and Roseobacter are two genera with a common ancestor in Alphaproteobacteria
Indicate whether the statement is true or false.
Most of the bacteria that cause human disease are ____
a. chemoautotrophs only b. chemoheterotrophs c. photoautotrophs d. photoheterotrophs only
e. chemoautotrophs and photoheterotrophsA naïve lymphocyte ____
a. is bound directly to an antigen b. has not yet bound to antigen c. is an antigen-presenting cell d. is a phagocyte e. is inflammatory