When environmentalist Rachel Carson warned of a "silent spring," she was referring specifically to:
A) the senseless slaughter of migratory birds by hunters.
B) the threat posed to birds by widespread application of pesticides.
C) the threat posed to insects by widespread application of pesticides.
D) the threat posed to amphibians by newly emerging diseases.
E) catastrophic drought caused by global climate change.
Ans: B) the threat posed to birds by widespread application of pesticides.
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Pneumocystis pneumonia occurs widely in ________.
A. immune compromised hosts B. cattle C. children D. prisons and military installations
Which of the following terms best describes an organism that cannot exist in the presence of oxygen:
a. obligate aerobe b. facultative aerobe c. obligate anaerobe d. facultative anaerobe
A decrease in ________ is followed by the gradual degradation of the corpus luteum
A) LH B) FSH C) estrogen D) progesterone
population
What will be an ideal response?