The main idea of the essay is that
a. although the book was popular, the events in it were not supported by facts.
b. DDT is a dangerous chemical that needed to be banned.
c. one person does not have much impact on public policy.
d. Rachel Carson's book significantly impacted public policy.
Question 2
What does the author mean when he writes Ghosts of species past haunt ecosystems worldwide, which
have already lost not just one or another type of grass or roundworm but also some of their strength at sustaining life
as a whole?
a. Around the world, ecosystems are so impacted by the loss of plant and animal diversity that it is no longer
possible for them to sustain life.
b. Losing types of grass and roundworms can cause some negative effects but not enough to cause concern.
c. Past extinctions of plants and animals around the world had little effect on the ecosystems of today.
d. Past extinctions of species have already negatively affected the ability of ecosystems around the world to sustain
life.
Feedforward events can be conditioned to external stimuli.
Summary of events in a typical humoral immune response.
Spider main organs
Role of Desirable and Undesirable Events on Susceptibility to Upper Respiratory Infections
Major events in the storage, retrieval, and use of fuels in the fed and unfed states
Locations of early developmental events.