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.
Pre–Main-Sequence Evolutionary Tracks
An example of a manual appointment book.
Identify the Main Term
The cascade of events by which the stroke-induced release of glutamate kills neurons.
The major events in meiosis in an animal cell with metaphase
Main mechanism of carbon dioxide transport and exchange. A lesser amount of CO2 travels to the lungs