Protective coloration is not absolute; it changes
( 35 )and evolves. One example of adaptive coloration
concerns the English peppered moth. Originally, the
light coloring of these insects disguised them from
birds as they rested on tree trunks covered with pale
lichens. In the nineteenth century, industrial pollution
( 40 )began killing the lichens. The moths now stood out
against bare tree trunks and smoke-darkened
vegetation. Soon, dark-colored peppered moths, which
had always existed in small numbers, began to
outnumber the light-colored moths. But in the
( 45 )twentieth century, strong antipollution laws were
passed, and light-colored peppered moths made a
comeback.
33. Which of the following best tells what the passage is about?(A) how animals blend into their surroundings
(B) several types of protective coloration
(C) contrasts among the tree frog, the zebra, the caribou, and the skunk
(D) a description of predators in the animal kingdom
(E) the difference between cryptic resemblance and disruptive coloring34. According to the passage, which of the following is not a form of protective coloration?(F) disruptive coloring
(G) seasonal changes in pigmentation
(H) adaptive coloration
(J) cryptic resemblance
(K) mottled light35. The author uses the caribou and the stoat as examples of animals that(A) change their color according to the time of year.
(B) are protected by disruptive coloring.
(C) possess valuable white fur.
(D) have prominent markings to warn predators.
(E) protect themselves by constantly changing their coloring.