One of the most complex communication
systems---certainly among invertebrates---is that
of honeybees. For maximum foraging efficiency,
workers must convey to one another the location of
good food sources, which may change frequently
as various flowers bloom or new fields of flowers
are located. How do honeybees communicate?
The problem was studied in the 1940's by Austrian
zoologist Karl von Frisch. By carefully watching
individual bees when they returned to the vertical
face of an open hive, von Frisch discovered that other
bees gather around the bee that has returned.
The returned bee then goes through a “dance.” Based
on his experiments, von Frisch proposed that the
dance indicates the location of food. If the source
is relatively close---less than about 50 meters---the
bee moves rapidly sideways in tight circles (the
“round dance”), causing the others to become
excited.
Often the dancer regurgitates some nectar
that the others taste. The workers then leave the hive
and begin foraging nearby. Although the round dance
does not indicate direction, tasting the nectar is likely
to help the bees identify a scent to fly toward.
If the food is farther away, more information is
needed. A worker returning from a longer distance
does a “waggle dance”: a half-circle swing in one
direction, followed by a straight run and then a half-
circle swing in the other direction. According to
von Frisch, this dance indicates both direction and
distance. The angle of the straight run in relation to
the vertical surface of the open hive is the same as
the horizontal angle of the food in relation to the Sun. If
the bee runs at a 30º angle to the left of vertical, the
other workers will fly 30º to the left of the horizontal
direction of the Sun. If the dancer runs directly upward,
the others will fly directly toward the Sun, and so forth.
Distance to the food is indicated by variation in the
speed at which a bee wags its abdomen during the
straight run.
紅色的部份是說蜜蜂垂直飛行的角度和往太陽方向平行飛行的角度是相同的
這樣翻好像怪怪的
請問各位這句話應該怎麼講比較好
因為看不太懂所以Q239 也不知該如何選
Q239 It can be inferred from the passage
that if a bee makes a straight run
downward in the “waggle dance,” the
food is located
ま(A)in the direction opposite the Sun
(B)in the direction directly towardthe Sun
ま(C)in the direction opposite thebeehive
ま(D)opposite the vertical surface of the open beehive
這一題的答案是A
