C. To protect the embryo inside. D. To help the seed float in the air. 相关知识点: 试题来源: 解析 C。解析:种子的种皮的作用是保护内部的胚。选项A,胚乳是为发育中的胚提供食物的,不是种皮,A错误。选项B,种皮不能直接参与光合作用,B错误。选项D,种皮没有帮助种子在空中漂浮的作用,D错误。
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Seeds are how the life of a plant begins. Examine the process of seed creation, how pollen is spread by pollinators to fertilize seeds, and how...
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Scarification is a treatment where the seed coat is partially removed or damaged to make it easier for the radicle (root) to come out. This video shows you how to scarify seeds. Germination Codes Several organizations have developed germination codes to make it easier for gardeners to know ...
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The seed was sprayed over the ground in huge quantities by aeroplanes. The planes had been planting seed for nearly a month when it began to rain. By then, however, in many places the grass had already taken root. In place of the great trees which had been growing there for centuries,...
单项选择7.Myjacketis___.It’sthecolorofthesea(海洋).A.blue B.red C.purple D.brown8.—Whatcolorisyournewcoat?—___A.It’syellow. B.It’snice. C.It’sold. 单项选择9.—Wepickedapplesonthefarmandhadfunyesterday.—___wonderfuldayitwas!A.How B.What C.Whata10.Look!Thereare___cows...
Seed Capital vs. Seed Stock Seed stock may also be used to refer to the startup capital a company raises to establish itself. This is more often referred to asseed capital, and often comes from the founders' assets, friends, or family. At times, a company will sell a limited number of...