You observe a fish-eating osprey bird with its chicks near ...

[abc]

You observe a fish-eating osprey bird with its chicks near Everglades National Park. What commonly used pesticide nearly caused the extinction of this and other large predatory bird species in the 1970s?
 
  A) Malathion
  B) Round Up
  C) DDT
  D) Pyrethroids

Question 2

Which of the following best illustrates bias in scientific investigations?
 
  A) Investigations of the cause of AIDS are limited by our inability to see viruses.
  B) Investigations of the health effects of smoking are funded and published by a tobacco company.
  C) Researchers studying heron nests notice that some baby herons fall out of nests and are killed.
  D) An experiment testing the effect of a new drug has only one control group.

[joneynes]

Answer to Question 1

C

Answer to Question 2

B