Biology, 18.05.2021 21:00 katie18147
A certain stream that was historically clear and clean has become increasingly polluted with fertilizer waste over the years. Which of these describes a likely result of this pollution?
А. Stone flies and midges thrive and compete for the same food source
B. Riffle beetles have become more abundant in the stream
C. Mayfies that were previously abundant are no longer present in the stream
D. Large numbers of crayfish have suddenly died.
Answers: 2
Biology, 21.06.2019 21:30, irishdreamer0689
List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.
Answers: 3
Biology, 22.06.2019 15:40, yourfreeshoppep3u91x
Which kind of mutation has occurred when the codon for an amino acid is changed to a stop codon? a. a silent mutation b. a missense mutation c. a frameshift mutation d. a nonsense mutation
Answers: 1
A certain stream that was historically clear and clean has become increasingly polluted with fertili...
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