Which of the following human activities has virtually no impact on natural ecosystems?
A) irrigation of cultivated fields
B) application of fertilizers to cultivated fields
C) shrimp farming along tropical coastlines
D) damming of rivers
E) All of the above activities have potentially serious impacts on natural systems.
Ans: E) All of the above activities have potentially serious impacts on natural systems.
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Bacteria reproductive strategies include all of the following EXCEPT
A. budding. B. multiple fission. C. binary fission. D. formation of mutinucleoid filaments that break apart into uninucleate spores. E. fusion of two bacterial cells that then split into four uninucleate cells.
Scientists now believe that comets falling to early Earth played a role in the evolution of life. What role did these comets play?
A) They brought CO2 and H2O. B) They generated a lot of energy when they hit Earth. C) They brought ammonia ions (NH4). D) All of the above are true.
Centrosomes are sites where protein dimers assemble into ________
Fill in the blank(s) with the appropriate word(s).
According to the results of the growth on the blood agar plate, match the organism with its hemolysis pattern.
Beta Hemolysis A) Lactococcus lactis B) Staphylococcus aureus C) Staphylococcus epidermidis