A key difference between eukaryotic and prokaryotic genomes is
a. the lack of controls of gene expression in prokaryotes.
b. the physical arrangement of genes on the chromosome(s).
c. the near simultaneous transcription and translation that occurs in eukaryotes and is strictly
sequential in prokaryotes.
d. the physical separation of transcription and translation in prokaryotes compared to no
separation of the processes in eukaryotes.
e. the regulation of the cell cycle by eukaryotes which is not observed in prokaryotes.
B
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Two hundred years ago, the fly species Rhagoletis pomonella only laid its eggs on fruit of the hawthorn tree. Today, different "host races" of R. pomonella lay their eggs on hawthorns OR apples. Apples occur within the range of hawthorns, so divergence between apple flies and hawthorn flies could be the first step in sympatric speciation. Choose the evidence that would suggest that R. pomonella is currently undergoing sympatric speciation. Check all that apply.
_____ Apple flies typically mate with apple flies, and hawthorn flies typically mate with hawthorn flies. _____ Apple flies and hawthorn flies emerge from their hosts at different times of the year. _____ Apple flies and hawthorn flies are able to form fertile hybrids. _____ Apple flies and hawthorn flies are physically indistinguishable from each other. 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 sympatric speciation? 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?
Over geological time, organic matter from seedless vascular plants, buried beneath ____, formed the fossil fuels we
use today.
a. agricultural fields b. ocean and river sediments c. volcanic ash d. granitic and basaltic rock e. Earth’s mantle
Magnification
a. is the amount that an object's image is enlarged. b. is the extent to which detail in an image is preserved during the magnifying process. c. is the degree to which image details stand out against their background. d. focuses light rays emanating from an object to produce an image.
It is the presence of a specific antigen that causes a developing lymphocyte to shuffle its genes in such
a way that it can produce an antibody that is the right shape to attack that antigen. Indicate whether the statement is true or false.