These graphs show the amount of lead in the air and the amount of violent
crime over several decades. when was the violent crime rate highest in each
city?
studies of the relationship of violent behavior to level of
lead in the air
chicago
san diego
atlanta
new orleans
&
a
s
1992
1972
02
982
2919
2012
2002
2012
natural log of aggravated assault rate
-
- natural log of atmospheric pb
o
o
o
a. at random times, regardless of lead level
b. when the lead level was highest
c. when the lead level was lowest
o
d. in the mid-1970s, regardless of city

4the indian leaf butterfly has traits that allow it to resemble a leaf. the bright colors of the monarch butterfly indicate that the butterfly tastes bad and can be poisonous. how does the appearance of these butterflies them to survive? f the indian leaf butterfly is able to avoid predators while the monarch butterfly warns predators away. g. the indian leaf butterfly frightens predators away while the monarch butterfly poisons predators before they can eat it. h both butterflies rely on camouflage to avoid predation. j both butterflies cooperate with one another to avoid predation.

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

What is the name of the type of cell division that occurs in the prokaryotic cell cycle