[請益] tpo45 閱讀Wind pollination
Wind pollination does, of course, require a lot of pollen. Birch and hazel
trees can produce 5.5 and 4 million grains per catkin, respectively. There
are various adaptations to help as much of the pollen go as far as possible.
Most deciduous wind-pollinated trees (which shed their leaves every fall)
produce their pollen in the spring while the branches are bare of leaves to
reduce the surrounding surfaces that "compete" with the stigmas (the part of
the flower that receives the pollen) for pollen. Evergreen conifers, which do
not shed their leaves, have less to gain from spring flowering, and, indeed,
some flower in the autumn or winter.
8.According to paragraph 3, why do most deciduous wind-pollinated trees produce
their pollen in the spring?
A To avoid competing with evergreen conifers, which flower in the fall or
winter
B So that the leaves of the trees receiving the pollen will not prevent the
pollen from reaching the trees stigmas
C Because they do not have enough energy to produce new leaves and pollen at
the same time
D In order to take advantage of the windiest time of year
答案B 翻成:所以樹的葉子接收花粉將不會防止花粉直接從樹的花蕊而來
感覺還是跟原文的意思有落差
請問該怎麼解析答案B這個選項呢?
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