The accompanying figure is a good illustration of:



a. bioconcentration.

b. biological magnification.

c. persistence.

d. narrow-spectrum botanicals.

e. the pesticide treadmill


b

Biology & Microbiology

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True or false: Amino acids can be spontaneously generated in vitro, but only under anaerobic conditions

A. true B. false

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The structure of DNA and RNA differs in that:

A. DNA is typically single-stranded, whereas RNA is double-stranded. B. DNA folds into complex three-dimensional structures necessary for its activity. C. DNA building blocks have four different nitrogenous bases, whereas RNA has a fifth base. D. DNA contains a pentose sugar that has an additional hydroxyl group, which is lacking in the sugar found in RNA. E. RNA folds into complex three-dimensional structures necessary for its activity.

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Visual information is carried from the retina to the brain via

A) the optic nerve. B) rhodopsin. C) photopsins. D) the blind spot.

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All of the following are correct about prokaryotes, except 

A. they have organelles. B. they are found nearly everywhere. C. they are smaller than eukaryotes. D. they are less complex than eukaryotes. E. they lack a nucleus.

Biology & Microbiology