The following passage contains TEN errors. Each indicated line
contains a maximum of ONE error. In each case, only ONE word is involved.
You should proofread the passage and correct it in the following
way: For a wrong word, underline the
wrong word and write the correct one in the blank provided at
the
end of the line. For a missing word, mark
the position of the missing word with a" A" sign and write the word
you believe to be missing in the blank provided at the end of the
line. For an unnecessary word, cross out the unnecessary word
with a slash "—" and put the word in the
blank provided at the
end of the line.
Human vision like that of other primates has evolved in an
arboreal environment. In the dense complex world of a tropical forest, it is
more important to see well to develop an acute sense of smell. In the
41
______ course of evolution members of the primate line has acquired large
42 ______ eyes
while the snout has shrunk to give the eye an unimpeding view.
43 ______ Of mammals only
humans and some primates enjoy color vision. The red flag is black to the
bull. Horses live in a monochrome world. Light visible to human eyes,
therefore, occupies only a very narrow band in the whole
44 ______ electromagnetic spectrum.
Ultraviolet rays are invisible to humans though ants and honeybees are
insensitive to them. Humans have no direct perception
45 ______ of infrared rays like the rattlesnake that has receptors
tuned into 46
______ wavelengths longer than 0. 7 micron. The world would look eery
different 47 ______ if human eyes
are sensitive to infrared radiation. Then instead of the darkness
48 ______ of night, we would be able to move easily in a strange
shadowless world where objects glowed with varying degrees of intensity. But
human eyes excel in other way. They are in fact remarkably discerning in
color gradation. 49 ______ The
color sensitivity of normal human vision is rarely surpassed even
50 ______ sophisticated technical
devices.