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1805   Jeff's ______ is damaged because of alcohol abuse.
(A) prayer
(B) liver
(C) petal
(D) effect
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答案:B
難度:簡單
10
 【站僕】摩檸Morning:有沒有達人來解釋一下?
倒數 1天 ,已有 0 則答案


Questions 1-12 Orchids are unique in having the most highly developed of all blossoms, in which the usual male and female reproductive organs are fused in a single structure called the column. The column is designed so that a single pollination will fertilize hundreds of thousands, and in some cases millions, of seeds, so microscopic and light they are easily carried by the breeze. Surrounding the column are three sepals and three petals, sometimes easily recognizable as such, often distorted into gorgeous, weird, but always functional shapes. The most noticeable of the petals is called the labellum, or lip. It is often dramatically marked as an unmistakable landing strip to attract the specific insect the orchid has chosen as its pollinator. To lure their pollinators from afar, orchids use appropriately intriguing shapes, colors and scents. At least 50 different aromatic compounds have been analyzed in the orchid family, each blended to attract one or at most a few species of insects or birds. Some orchids even change their scents to interest different insects at different times. Once the right insect has been attracted, some orchids present all sorts of one-way obstacle courses to make sure it does not leave until pollen has been accurately placed or removed. By such ingenious adaptations to specific pollinators, orchids have avoided the hazards of rampant crossbreeding in the wild, assuring the survival of species as discrete identities. At the same time they have made themselves irresistible to collectors.
【題組】5. Which of the following is a kind of petal?
(A) The column
(B) The sepal
(C) The stem
(D) The labellum
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答案:D
難度:非常簡單
25. 依據 A、B、C 三類基因調控被子植物萼片 (sepal)、花瓣 (petal)、雄 蕊 (stamen) 及心皮 (carpel) 發育之假說 (簡單示意如右圖),花萼發 育自只有 A 基因表現的區域,花瓣發育自 A、B 基因都表現的區域, 雄蕊發育自 B、C 基因都表現的區域,心皮發育自只有 C 基因表現的 區域。請問在 B 基因突變的植株中其花朵構造最可能為下列何者? 
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答案:C
難度:簡單
10
 【站僕】摩檸Morning:有沒有達人來解釋一下?
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Ⅱ.【單選題】51-75 題,每題 2 分,共計 50 分。答錯 1 題倒扣 0.5 分,倒扣至本大題零分為止,未 作答,不給分亦不扣分。
51. Which of the following statement about plant flower is correct?
(A) A flower is the vegetative organ of a plant.
(B) A flower lacking any of sepal, petal, stamen or carpel is an imperfect flower.
(C) Most grasses have imperfect flowers.
(D) Floral parts in all angiosperm are arranged as four whorls.
(E) Floral parts are sequentially initiated at the floral meristem.
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答案:E
難度:困難
10
 【站僕】摩檸Morning:有沒有達人來解釋一下?
倒數 1天 ,已有 0 則答案